1990–1999 Grant Mitchell arrives in
Albert Square in February 1990 with his older brother
Phil (
Steve McFadden), and the pair become co-owners of the local garage, The Arches. Grant had returned to civilian life in London having been a
paratrooper in the
Army, which included serving in the
Falklands War at the age of 19. After a brief fling with
Julie Cooper (
Louise Plowright) and getting involved in various dodgy deals, Grant starts wooing the local barmaid,
Sharon Watts (
Letitia Dean). She grows attracted to his machismo, and soon their flirting progresses into a relationship. Fiercely protective of his girlfriend, most of Grant's initial problems in the Square revolve around his over-possessive nature and jealousy. He puts Sharon's boss
Eddie Royle (
Michael Melia), the landlord of The Queen Victoria
public house, in hospital after he makes a pass at Sharon; he later becomes prime suspect for Royle's murder, but is proved not guilty when the killer is revealed to be
Nick Cotton (
John Altman), the well established local villain who eventually owns up to the crime but is found not guilty in court. In the wake of this, Grant decides to re-enlist in the army; however, he is left despondent after getting rejected for failing their psychiatric tests. marry (1991). Despite his hot-headed tendencies, Sharon sees a different side to Grant, and when he proposes marriage to her, she accepts on the condition that he buys her childhood home, The Queen Vic, which he does. Grant marries Sharon in December 1991 and together they run The Queen Vic. Their marriage is stormy and punctuated with violent rows and fights. Grant is desperate for a child, although Sharon would rather concentrate on the pub for the time being, and when he discovers Sharon is still taking contraception, he smashes up the pub and then disappears. In his absence, Sharon is comforted by Phil and they begin an affair, although this comes to an abrupt end when Grant returns and promises to change his ways. He cannot live up to his promises, however, and, on Sharon's birthday in October 1992, Grant sets fire to The Queen Vic to generate insurance money to pay off debts. He does not check to see whether Sharon is out of the way, and she and her dog
Roly nearly die in the blaze. The insurance money is insufficient, and Sharon reacts with fury when she discovers what Grant has done. She leaves Grant for a while, and, when she returns and attempts to seize control of The Queen Vic, Grant turns violent, assaults Sharon and her best friend,
Michelle Fowler (
Susan Tully), and is imprisoned on remand. While he is in prison, Sharon and Phil rekindle their affair, but neither can confess to Grant, and it ends when he is released from prison. Sharon and Grant patch up their relationship; however, in the autumn of 1994, Grant discovers a tape on which Sharon talks about her affair with Phil, and plays it to a packed pub at Phil's engagement party to his fiancée,
Kathy Beale (
Gillian Taylforth). In response, Grant batters Phil – leaving him with a
ruptured spleen – and is vindictive towards Sharon until she flees to the
United States, signalling the end of their marriage after just three years. She returns briefly to enact revenge – making Grant realise that he is still in love with her, he chooses to be with Sharon over his family. Sharon is ready to turn him down in front of a packed pub and his family; however, in the end, she cannot go through with it, and stops him from publicly proposing before he humiliates himself. She then tells him that she loves him too but their relationship can no longer work, before returning to the US, leaving Grant heartbroken. They are then divorced and do not see each other for more than 10 years after this. Michelle has a volatile relationship with Grant but, following Sharon's exit, falls pregnant following a
one-night stand with him and then flees to the US without telling Grant that he is to be a father. Grant would not find out that the baby is his until years later. With Sharon and Michelle both gone, he goes on to marry the much younger
Tiffany Raymond (
Martine McCutcheon), who soon becomes pregnant – although it is unclear whether he or Tiffany's ex-partner
Tony (
Mark Homer) is the father of her child. When Grant discovers this, he is incensed and throws Tiffany out. He begins a relationship with
Lorraine Wicks (
Jacqueline Leonard), until a
paternity test reveals that Grant is the father of her baby,
Courtney (Carissa and Josephine O'Meara), who is born in March 1997. He reunites with Tiffany to be near his daughter, but by this time his marriage has deteriorated. During an argument, Tiffany falls down the stairs of the Vic and is seriously injured, but makes a full recovery. Just after Christmas 1998, Tiffany discovers that Grant has had an affair with her mother
Louise (
Carol Harrison), and plans to flee to
Spain with Courtney. However, Grant discovers her plan and retrieves Courtney. Tiffany attempts to snatch Courtney, but is hit by a car driven by Grant's stepfather
Frank Butcher (
Mike Reid); she dies seconds later as the clock struck midnight. Grant tries to move on by dating barmaid
Nina Harris (
Troy Titus-Adams) for a while, but dumps her after discovering her past as a
prostitute. Grant goes into partnership with Phil's new enemy
Steve Owen (
Martin Kemp) and they end up having a feud, which ends with Grant punching Steve after getting annoyed with his disrespectful attitude towards him. By then, Grant and Phil have conducted a plan to cheat some gangsters by intercepting a
drug deal and stealing a large amount of cash – in order to take care of their debts. The job is initially successful, but it quickly grows obstructive when Phil finds out that Grant had slept his ex-wife Kathy before doing the job. He confronts Grant after the job and Grant admits he did it in revenge for Phil's affair with Sharon. As they attempt to flee from the oncoming police, Phil pulls out a gun and shoots the steering wheel in their getaway car – causing Grant to plunge the car into the
River Thames. Phil is rescued, but Grant is not found and presumed dead. It transpires a week later that Grant has survived, and he leaves the country with Courtney and the stolen money to
Rio de Janeiro. He remains in contact with his mother and brother.
2005–2006 Grant returns to Walford six years later with Phil to exonerate their younger sister,
Sam (
Kim Medcalf), for the murder of her ex-boss and Sharon's adopted father,
Den Watts (
Leslie Grantham). Although she was involved in the events surrounding Den's murder, Sam was framed for the crime by his widow and her nemesis
Chrissie (
Tracy-Ann Oberman) – the real murderer. Grant manages to put behind him his differences with both Phil and Sharon, forgiving Sharon when she confesses that she aborted his child. The brothers manage to convince Sharon that Chrissie is the real killer and that Sam is innocent. Whilst teaming up with Phil and Sharon to prove Sam's innocence, Grant forms a rivalry with her husband
Dennis Rickman (
Nigel Harman) upon learning the latter had previously teamed up with Den to imprison Phil for robbery. Grant and Dennis put their differences aside to help Phil with their conflict against
Johnny Allen (
Billy Murray), the local gangland kingpin who holds a grudge against the Mitchell brothers because of their mother
Peggy (
Barbara Windsor) having her own grievances against Johnny himself. When Johnny extracts CCTV footage of Chrissie confessing to her boyfriend
Jake Moon (
Joel Beckett) that she killed Den, he plans to use the tape as bait for Phil and Grant – intending to kill them. The brothers eventually beat Johnny at his nightclub office in order to get the tape, which is promptly delivered to the police; as a result, Sam is released from prison and Chrissie is arrested for Den's murder. Following Sam's release, Grant initially returns to Rio – only to later come back to Walford with Courtney (now played by
Megan Jossa), citing family and financial problems back in Brazil. When Phil learns about his brother's return, he tricks Grant into helping him with quest against Johnny. During Grant's absence, Phil and Johnny embarked on a feud that led to Dennis and Sharon getting involved. The impact escalated after Dennis humiliated Johnny on Christmas Day 2005, which prompted Johnny to throttle Sharon with an ultimatum; Dennis will be killed unless she and him leave Walford for good. On the eve of 2006 commencing, Dennis learned from Phil about the threat Johnny made to Sharon – as well as being told that Johnny killed his best-friend and Sam's ex-husband,
Andy Hunter (
Michael Higgs), on the same night Chrissie killed Den. This resulted in Dennis beating up Johnny, who then ordered Jake's brother
Danny (
Jake Maskall) – his henchman – to kill Dennis. Following Dennis' murder, Phil was wracked with guilt for sparking the events of Sharon losing her husband and has vowed revenge on Johnny more than ever. After hearing Phil explain his reasons for wanting to bring Johnny to justice for killing Dennis, specifically as a promise he made to Sharon before she left Walford, Grant reluctantly accompanies his brother in settling their score with Johnny once and for all. Their efforts quickly falter by Grant arguing with Phil about the situation he has put them in, all the while Phil demands Grant to maintain their course against Johnny – who uses this opportunity to capture the brothers. Johnny later orders Danny to kill the brothers and bury them in the woods. After marching them into the forest for execution, Danny prepares to kill Grant; however, the brothers are saved when Jake appears and shoots Danny – accidentally killing him. After telling the brothers that it was Danny who killed Dennis on Johnny's orders, Jake allows Phil and Grant to flee whilst he himself proceeds to bury Danny in the woods. Phil and Grant rush back to Johnny's mansion to confront him once more, only to find out that he has already been arrested; Johnny surrendered to the police after his daughter,
Ruby (
Louisa Lytton) threatened to disown her father unless he confessed to his crimes. Following his arrest, Johnny is sentenced to life imprisonment and later dies of a heart attack – allowing Phil and Grant to finally put their demons to reason for good. The brothers reconcile after Phil apologises to Grant for the situation he put them in, and Grant forgives Phil for his actions. As time goes on, Grant begins flirting with
Jane Collins (
Laurie Brett) – the girlfriend of Kathy's son
Ian (
Adam Woodyatt) – after seducing her. Their affair ends when Phil catches them together and Grant then has a
one-night stand with 19-year-old
Chelsea Fox – to his mother's outrage. Shortly after, his estranged Brazilian wife,
Carla (
Christianne Oliveira), shows up in Walford. Grant and Carla resume their relationship, but Carla's ex-partner
Ray (
David Kennedy) soon arrives to retrieve
£12,000 that Carla has stolen from him. Carla and Ray resume their affair and plan to fleece Grant for £25,000. Grant learns of Carla's scam; unbeknownst to Carla he chases Ray away and leads Carla to believe he has fallen for her lies. Grant catches her attempting to steal his money and reacts by dumping her in a litter bin, ending their marriage. After quitting his job at the newly reopened
Scarlet nightclub, currently owed by Jake following Johnny's imprisonment, Grant leaves the country again with Courtney for a new life in Portugal.
2016 In May 2016, Peggy returns to Albert Square following a diagnosis of terminal cancer. She decides to stop her treatment, but Phil tries to change her mind, enlisting the help of Sharon. Sharon then calls Grant in Portugal, leaving a voicemail saying that his family needs him. Grant returns to the square for the first time in nearly a decade soon after and walks in on Phil and Peggy. He plans to take Peggy with him back to Portugal, only for her to say that her cancer is active. Grant is angry when Peggy reveals that her plan for him and Sam to learn about it was by letters to them after her death by suicide, however Phil and Grant seemingly convince Peggy not to do this. Grant tells Phil he immediately needs the money that he lent him. Knowing he cannot get it, Grant threatens him unless he returns the money. Grant returns to Portugal, and Sharon has to call him about Peggy having killed herself. When Sam returns to Walford for Peggy's funeral, she reveals that Grant is unable to attend the funeral, although Grant secretly attends, laying a flower and watching from a distance. When Grant's nephew
Ben Mitchell (
Harry Reid) goes missing and Phil is reluctant to get the police involved, Sharon contacts Grant for help, but Courtney (now played by
Alice Nokes) meets Sharon instead; Grant has not seen the messages. Sharon decides to go to the police and finds Grant outside the police station as a result of being drunk and disorderly. Grant goes to The Queen Vic where he flirts with
Belinda Peacock (
Carli Norris). Grant tells Courtney that Phil killed Peggy. When Courtney tells Grant that Sharon wanted to meet him, he goes to see Sharon and declares his love to her, but she is not interested. Grant accuses Phil of killing Peggy and asks for his money back, but Phil does not have it. Grant tries to persuade Sharon to go to Portugal with him but she declares her love for Phil. Grant telephones Courtney to ask to stay with her but she refuses. Grant then meets Belinda again and they go to her home for sex but are interrupted by her family. Phil finds a letter in Sharon's bag that Michelle sent Peggy, revealing that Grant fathered Michelle's child,
Mark Fowler Jnr (
Ned Porteous) 21 years previously. Grant visits Jane where he learns that she has been paralysed by her adoptive son
Bobby Beale (Eliot Carrington). He admits that he has lost his home and business in Portugal and is in debt. Grant and Jane both comfort each other, but Ian walks in on them and shouts at Grant for deserting his family. Grant leaves, ignoring Phil, who is attempting to tell him about Mark. Courtney calls Grant, who is staying with
Aunt Sal (
Anna Karen) due to losing his villa and bar in Portugal, for help after Ben and
Jay Brown (
Jamie Borthwick) are kidnapped by the men who attacked Ben and killed his boyfriend
Paul Coker (
Jonny Labey). Grant rushes to Courtney's aid and assumes Mark is attacking her, but Sharon tells him he is Michelle's son. Phil initially insists he does not need Grant's help but then accepts it. Phil collapses so Grant vows to rescue Ben. Mark gets in Grant's car to help him, and they find Ben and Grant scares off the men. Grant reconciles with Phil, admitting he no longer wants the money Phil borrowed from him, and Phil tells Grant that Mark is his son. Courtney is angry with Grant when he stops her kissing Mark. Grant confronts Ian about keeping the secret for so long and punches him after Ian insults his parenting skills. Sharon tells him the reasons Michelle did not want him involved and Grant agrees that Mark would be better off not knowing, but Jane convinces Grant otherwise, so Grant offers to take Mark for a drink. After a heart to heart, Grant realises that Mark would be better off not knowing and decides to return to Portugal after seeing Phil. Phil gives him money, and he reunites with Courtney and the pair return to Portugal. Mark also works out who Grant is, but Sharon convinces him he is better off with his adoptive father – Tim.
2025–2026 Over nine years later, Nigel - who has recently returned to the Square and has been living with Phil - contacts Grant over his concerns regarding Phil's health and behaviour due to his
severe depression and
psychosis. Grant subsequently returns with Nigel and walks into Phil's home whilst he is in the midst of contemplating
suicide. Unaware of this, Grant refuses to believe anything is wrong and attends Billy's
wedding to former spouse
Honey Mitchell (
Emma Barton); however, it is thereupon Grant sees that Phil has relapsed and confronts him about it. It is beforehand Grant gets reacquainted with Sharon before he comes face-to-face with Bianca for the first time in nearly 25-years; Bianca confronts Grant for his mistreatment of Tiffany in the past. When local pub landlady
Linda Carter (
Kellie Bright) discovers suicide notes at Phil's house, she, Grant and Nigel rush to the garage, where they discover Phil ready to shoot himself. Grant disarms him but is unable to cope with the situation and storms off, assisting Bianca in rescuing her sister
Sonia Fowler (
Natalie Cassidy) from the Vic after it is destroyed by an explosion. Afterwards, Nigel admonishes Grant for not supporting Phil through his illness and takes him back to the garage as Phil is taken to a mental health clinic; Grant is ultimately unable to accompany him. Grant visits Phil at the mental health clinic with Nigel, and he apologises to Phil for not being there for him, Phil claims Grant does not care about him and is only concerned and there for himself. Phil tells Grant that he does not need him in his life anymore and ultimately disowns him, leaving Grant devastated. When Grant overhears Nigel stating that he wants to die on his own terms before his dementia progresses, he is furious when Nigel rejects his attempts to convince him otherwise. Grant visits Sharon and tells her that he is leaving for Portugal the next day. They discuss
their past, and Grant admits his regrets that he was not there for Phil in his darkest moments in the last several years, and Sharon admits that Michelle's son Mark knows that Grant is his father but chose not to get in touch with him. Sharon thanks Grant for saving her life and urges him to make amends with Phil and Nigel. The discussion turns passionate, and Grant and Sharon have sex. The next morning, Sharon confronts Grant and tells him that she does not want to relive their past, and she still loves and wants to protect Phil. An angered Grant goes to the cab office to book a taxi to go to the station, and he spots Bianca having a panic attack. Grant helps Bianca calm down with some breathing techniques, and the pair make amends and discuss how coming back to Walford brings up old memories for them. Bianca suggests that instead of running away from his own problems, Grant could help some people who need it. Grant talks to Nigel and offers to take him with him to Portugal, to help and support him with his slowly declining dementia. He visits Phil at the mental health clinic, and he apologises to him for not being there to support him with the problems he has faced. He vows to keep in touch with Phil more often, and reassures him that he will recover from his mental health issues. Grant arrives at the station to leave for Portugal, Sharon meets him and tells him that she asked Michelle about getting Mark back in contact with him, and Grant explains that he will talk to Mark whenever Mark is ready. He also asks Sharon to be there for Phil when he is released from the clinic. Nigel arrives at the station, telling him that he is going to stay at Walford, Grant is unsure about his decision, but Nigel reassures him that he will be fine, and he needs to be there for Phil, and that he is starting to enjoy his stay at the Square. Grant and Nigel hug, vowing to remember their friendship, before Grant leaves. He returns to Albert Square in April 2026, after receiving a phone call from Mark, concerning Nigel's worsening condition. ==Reception==