Lance Byrne (pictured) plays Lance. Lance Byrne is played by
Ian McElhinney. He enjoys riding his horse, swimming, drinking and "[coming] out with pieces of wisdom". He has empathy towards the Kat and Alfie and is "very happy to embrace them" because he is a "good bloke". He is married to Roisín and is Andrew's father. He is the landlord of the pub in Redwater. In episode1, it is revealed that his wife, Iris, who died in a boating accident, lost a child in London and took Kathleen's child and brought him back to Ireland as her own, and Peter is unaware that Dermott is not his son.
Andrew Kelly Andrew Kelly is played by
Peter Campion. In flashback, young Andrew is played by Ryan Burke. He is the son of Padraig and Roisín, and is married to Bernie. Doyle Kennedy said that Roisín seems close to Andrew and his own family, but she is "almost overprotective", which may be because of the tragedy that affected the family in the past, and she relies on Andrew.
Dermott Dolan Father Dermott Dolan aka Luke Slater is played by
Oisín Stack. In
EastEnders episodes broadcast in January 2016, Kathleen discovers she gave birth to a son, Luke, after she passed out during the birth of her daughter
Zoe Slater (
Michelle Ryan). A nun,
Sister Ruth (
June Whitfield), explains that Kat's family, fearing that the child would turn out like his paedophile father, Kat's uncle,
Harry Slater (
Michael Elphick), handed him to the nuns in the convent where he was born. The nuns named him Luke and arranged for him to be adopted into an Irish family. In
Redwater first episode, Dermott is seen in a flashback scene, where he is involved in the Redwater Tragedy that kills his mother, Iris. 21 years later, Kathleen and Alfie arrive in Redwater, where Kat is attempting to find her son. Kathleen quickly befriends Dermott, the local Catholic priest, and Lance. Dermott is angry at being delivered orange juice by the local dairy farm when he has not requested it. After Kathleen confides in Lance that she is searching for her son, he tells his wife, Agnes, this, and they both know the true identity of her son. Agnes insists that nothing is said, but Lance tells Dermott that Iris and Peter are not his parents and that Iris lost her baby while staying in London, so brought back Kathleen's son as her own, and Peter does not know the truth. Lance offers to mediate between Dermott and Kathleen, so Dermott decides to think about it and speak to Lance the next morning. The next day, after finding more orange juice has been delivered, Dermott meets Lance while Lance is swimming in the sea and makes him eat a
sacramental wafer and then drowns him in the sea while flashing back to the tragedy, where he lets go of Iris's hand, allowing her to die. Dermott prays for Lance's soul, and then forgives him before leaving the scene.
Kathleen Moon (pictured) plays Kathleen Moon. Kathleen Moon is played by
Jessie Wallace. The character originally appeared in the soap opera
EastEnders from 2000 to 2005, and 2010 to 2016, in which she is usually called "Kat". The series of
Kat and Alfie: Redwater was created because in
EastEnders, Kat and her husband Alfie (
Shane Richie) had their marriage on track and needed more stories, and Kat had been "going round in a cycle of bad self-worth every few years, all down to the sexual abuse she suffered as a teenager from her Uncle Harry." It was decided that Kat should be shown as a survivor and move on to the next stage of her life, and she was taken back to "Kathleen", the child she was before she was abused.
Kat & Alfie: Redwater follows Kat and Alfie as they arrive in the fictional Irish village of Redwater to "search for answers to some very big questions" and put their past behind them. In some of Kat's final
EastEnders episodes, she discovers that she gave birth to a son, Luke, after she passed out during the birth of her daughter
Zoe Slater (
Michelle Ryan); Luke was adopted by a family in Ireland without Kat knowing he existed. Kat's sister
Belinda Peacock (
Carli Norris) recalls a time the family (minus Kat) went to Redwater and they conclude that Luke must be there. Treadwell-Collins confirmed that "the discovery that Kat has a secret son will [...] ultimately lead to the Moons realising that the answers to so many questions lie across the sea in Ireland." Director
Jesper W. Nielsen said the series is "About how one woman's search for a lost child opens Pandora's box; revealing the terrible lies and secrets in the little village of Redwater".
Redwater writer
Matthew Graham said, "Kathleen Moon is an unwitting bomb in
Redwater and creating the debris from her explosive arrival is what drew me to this project." Wallace was given a makeover for her part in
Redwater, different to how Kat looks in
EastEnders. Wallace explained that Kat's different look is because she has "mellowed" since leaving Walford and travelling to Spain, which she described as a "softer side to Kat than we've seen before", but said she still has a "fiery side to her, just not as much as we've seen in
EastEnders. Wallace described Kat as a "colourful person" with "a lot of layers to her" and said that after playing her for 16 years "means there's plenty underneath to bring to the surface." She is married to Padraig and is Andrew's mother. Of Roisín's relationship with Padraig, Doyle Kennedy said that they were in love once and had a child very young, and felt that the relationship then was a "youthful, possibly impetuous courtship and decision to marry that maybe hasn't worked out quite the way they thought it would." and later said she "has all the secrets and [does not] want to tell them. [She] want[s] to get in everybody's way, [she is] so horrible" and explained that Agnes is the matriarch of the family that the Moons get involved with. Flanagan said of Agnes: "I wonder why this woman hasn't been murdered long ago. [...] [H]ow hasn't someone murdered her? I would. She's very manipulative so that's what makes it yummy to play. Who wants to be nice? This is much more interesting."
Adeen Kelly Adeen Kelly is played by Ebony O'Toole-Acheampong. Adeen and her great-grandfather, Lance, have a "special bond" because Lance is "a bit of a kid" who never grew up, and Adeen is a "wild child" who is similar to Lance, so "the kid in him likes the kid in her." Ateh, who lives in Los Angeles, was told about the part by a friend who saw an advert looking for a mixed race actress. She sent in an audition tape and 10 days later was interviewed over
Skype by the director, producers and casting director, and was offered the part a few days later.
Eileen Harrington Eileen Harrington is played by
Angeline Ball. She also said that Eileen like to "show that nothing's a big deal" and "appears not to be a deep thinker". Eileen's return to Redwater makes her "less polished, less 'New York'", and her American accent drops away, as does her "hardened exterior". Eileen left Redwater because of her grief after she lost a child to drowning, and because for independence from her "a very strong mother and sister". Doyle Kennedy said that Roisín's relationship with Eileen is "interesting" and in reality, she and Ball have been friends for many years. Roisín is resentful of Eileen because Eileen left the farm and Roisín never had the opportunity to do so herself. She said, "They spark off each other in that way that sisters do—they're very sharp, very sarcastic. They're akin to a match and kindling, but there's something strong between them." Ball said Eileen and Roisín's relationship is "strained and competitive" and Eileen could be deeply bitter towards Roisín because Roisín did not suffer a loss and did not have to leave. She called it a "love-hate relationship". ==Recurring characters==