P. J. joined the
Victoria Police an unspecified amount of time before the start of the series. During his early career, he was posted to the Fitzroy Station in Melbourne, where he remained living with his mother. By 1994, P. J. had settled in to his role at Mount Thomas and had established a comfortable working relationship with the station sergeant,
Tom Croydon (
John Wood). In February of that year, the annual Mount Thomas Cup brought an array of colourful characters to the town, and provided him with the prospect of settling an old score with Barry Raymond "Apples" Maxwell. A daring daylight attack on a bookie looked like it might be the opening that he's looking for, but the perpetrator turned out to be the younger Maxwell brother. Ultimately, Apples never made it to town, he died in a car accident earlier in the day. Later in the first season, P. J. was reunited with a former flame when
Stock Squad detective Hillary Edmunds (Jennifer Botica) arrived in town to investigate cases of cattle-duffing. After spending an overnight stakeout together watching a stolen prized bull, P. J. was prepared to reignite their romance, only to be let down when Hilary stood him up. Hillary returned again later in the year with her uncle, who hoped to retire to a property he owned in the district, only to find that another farmer was claiming the land as his own under an obscure law. When a building on the property is destroyed by arson, P. J. found himself drawn into the dispute by his relationship with Hillary, whose single-mindedness regarding the case threatened any chance of them learning the truth. During the second season, P. J. was one of four officers targeted by an IID raid regarding allegations of police involvement in the sale and distribution of drugs. The IID officer assigned to search his house was Monica Draper, the detective who had reported corruption on the Regional Gaming Squad and had long suspected him of being "on the take". While the investigation was on-going, the news of a crashed prison bus saw P. J. placed back on duty, working with IID to question
Susan Croydon (
Beth Buchanan) about drugs found during the earlier raids. When
Adam Cooper (
Damian Walshe-Howling) and
Chris Riley (
Julie Nihill) are taken hostage in the Imperial Hotel, P. J. joined his colleagues in cordoning off the pub and, after Tom is shot, he took part in the interview of the shooter and the take-down of the escaped prisoners. Less than three months later, P. J. found himself under investigation by IID again when the local branch of the bank is robbed and the offender fingers him as an accomplice. The investigation was complicated by his mutual animosity with Monica Draper, who was assisting the "toe-cutters" with the inquiry. When his former boss,
Peter Grantham (David Glazebrook), arrived at the station to taunt P. J. about the investigation. P.J became suspicious that Grantham was setting him up, and his fears were realised when a search uncovered a portion of the stolen funds in his freezer. With her friend's career on the line,
Maggie Doyle (
Lisa McCune) approached her father,
Pat (
Dennis Miller), for help and together they uncovered evidence that Grantham had framed P. J., allowing him to return to duty. As the investigation into the shooting began, P. J.'s colleagues were supportive of him, but with the media and the brass clamouring for answers, the investigators from the Homicide Squad were anxious to keep everything above board, to prevent any implication of a cover-up. The situation was made worse by the arrival of journalist Paul Carson, who aired footage of the shooting which appeared to implicate P. J. as a cold-blooded killer and suggested that the shooting was a police reprisal for the murder of
Wayne Patterson by Raelene's cousin. During the coronial inquest, P. J. suffered a crisis of confidence on the back of a death-bed confession which put one of his earliest convictions in Mount Thomas in doubt. With P. J. tied up in the inquest, it was left up to Maggie to find out the truth, and potentially save his career. Eventually, the confession was proved false, and P. J. was cleared of any wrongdoing by the coroner. In 1997, P. J. and Maggie were drawn into an investigation at the local gold mine when Adam and new constable
Dash McKinley (
Tasma Walton) found prospector Hec O'Farrell in the mine, despite him no longer holding the lease. Hec's mate, Bert, is found bashed and their jar of gold dust is missing, with P. J. believing that Hec had taken the gold himself, but Tom and Dash are skeptical. The investigation took an unexpected turn when the new miners, Matt Kinsella and Jamie Burgess, discovered a nugget of gold just when the police are on hand to play witness. A routine check into the men's backgrounds uncovers the fact that both men were guards on duty during a bullion robbery. With this information in hand, P. J. and Maggie return to the mine to investigate, only to be trapped by a cave-in caused by an explosion. Trapped in close quarters together, they finally have a chance to explore a side of their relationship which they'd been suppressing for a long time. While waiting for rescue, the trapped couple discussed, among other things, their hopes and dreams for the future while managing to stay hydrated thanks to water dripping from the mine ceiling. Through mere chance, and a discarded
Minties wrapper, Dash and Adam realised that their colleagues were trapped in the mine while searching for Kinsella and Burgess. The rescue was complicated by the fact that the blast which caused the cave-in had made the rest of the tunnel unstable, but the
State Emergency Service volunteers managed to extricate them both before the roof caved-in completely. Once free of the mine, Maggie and P. J. were set on nailing the two men for the bullion robbery, and for attempted murder, only to learn that Burgess' partner had killed Kinsella, and tried to kill Burgess. During the
fifth season, P. J. found himself under investigation by Monica Draper yet again after a suspect claimed that his confession was obtained while he was in intense pain and in need of medical attention. P. J. invited Monica to listen to the tape of the interview, but when he presses play on the tape recorder, he discovered that the tape was missing. During the search for the tape, he realised that there was only one place he hadn't searched: Monica's handbag. To the shock of everyone, the tape was there, leading Monica to admit that she'd taken the tape to protect the suspect, who is her biological son. When P. J. realised that she was covering for her son, who actually took the tape, he put aside his animosity and decided to do everything in his power to help her. For a brief period in 1998, P. J. returned to the uniformed branch after he was selected as the
acting sergeant following the station's upgrade and Tom's promotion. He found himself unable to stay out of CI matters, however, and quickly decided that he was better off as a detective, and passed the acting sergeant's role over to Nick. Later that year, P. J. became concerned that he may have contracted
HIV after he cut his hand while rescuing a bloodied driver from his mangled car. No-one knew about the driver might be HIV-positive until a nurse at the local hospital contracted the virus after suffering a
needlestick injury while treating the man. P. J.'s secretive behaviour and his contact with the nurse led Maggie to suspect them of an affair, until he explained the situation. When the driver was seen on security footage holding up a service station with a syringe full of blood, it appeared certain that he was HIV-positive. The police soon discovered that everything isn't always as it seems when the truth comes out, the nurse actually contracted the virus while having an affair, and it was unlikely the P. J., nor Maggie, had anything to worry about. Throughout 1999, P. J. became worried for Maggie's safety as she doggedly pursued the drug ring which killed her brother,
Robbie. His worst fears were confirmed when she went missing and one of her contacts is found dead. Reinforcements arrive from St Davids, but P. J. was overwrought and it became apparent to everyone that his relationship with Maggie was far more than professional. Taken off the case, he continued to investigate privately with help from Pat Doyle, who informed him of a crooked cop working with the syndicate. After learning that Maggie was meeting with a new dealer, they rushed to the scene to find her car in flames, with a charred body inside. Fortunately, the body wasn't Maggie, but with someone wanting her dead, it soon became clear that she would need to enter Witness Protection for her own safety. After Maggie's return, P. J. briefly entertained the prospect of standing aside in favour of allowing her to have a relationship with
Ben Stewart (
Paul Bishop), but ultimately he proposed to her after an altercation with a group of Y2K survivalists. The engagement proves to be short-lived, however, when bent copper Barry Craig is killed in prison after doing a deal with Maggie. The deal included the names of everyone involved in the syndicate, including several cops, and she was now in danger. When her house is torched, it became clear that she needed to return to Witness Protection. Despite P. J.'s demands to go with her, it is organised that she will enter the program alone. Tragedy strikes for the couple when, on her way to a meeting with her brother
Mick (
Terry Serio), Maggie is shot and killed, dying in P. J.'s arms when he arrives on the scene. The investigation uncovered a key witness who placed P. J. at the crime scene, which gave the Homicide Squad enough evidence to charge him. The case against him quickly fell apart, however, when the witness is found dead and Ben uncovers evidence that the witness had been paid to set P. J. up. Over the next several months, P. J. continued to inch closer to finding the identity of his fiancée's killer. The breakthrough moment came when the driver of a crashed car left the hospital before shooting a local mechanic execution style and taking something from wreck of his car. In order to flush the killer out, P. J. agreed to act as bait, but the suspect was already waiting for them, and after he narrowly missed shooting P. J., he was taken out by a head-shot from one of the detectives. Then, more than ever, P. J. was sure that a corrupt cop was behind Maggie's death and, as the final pieces of the puzzle fell into place, he uncovered an unimaginable act of betrayal. Finally, he confronted Maggie's killer in a fight to the death which ended when Pat arrived, shooting and killing his last living child. In 2001, P. J.'s mother
Helena (
Arianthe Galani) arrived in town and invited him to join her at a "get rich seminar". Helena missed the seminar, which ends abruptly when an irate woman crashed her car through the building housing the seminar. As P. J. tried to investigate the woman and her feud with the seminar's host, his efforts were complicated by the fact that his mother was working to discredit the seminar host herself. Against his better judgement, he agreed to let his mother wear a wire, getting them the information they needed to arrest the con man, and later invited Helena to live with him full-time. Helena returned the following year, this time with her new boyfriend in tow, and immediately complicated when they purchased a collectable pottery item believed to be stolen goods. P. J. took an immediate dislike to Stefan (Bob Ruggiero), which put a lot of pressure on his relationship with his mother. Finally, Stefan sacrifices his own happiness to save Helena's relationship with her son, and drives off into the sunset alone, leaving Helena to make a heart-breaking admission to her son. Over the coming weeks, P. J. tried and failed to come to terms with his mother's terminal cancer diagnosis. When she lapsed into a coma that she would never wake from, he finally found it within himself to say goodbye after a chat with Ben. The
eleventh season started with P. J. investigating a break-in at the local
Salvation Army hall. He immediately suspected Luke Darcy, who had recently been released from prison. Despite finding no evidence linking him to the crime, and claims from multiple people that Luke has reformed and found religion, he doggedly pursued his hunch, bringing Luke in on several other matters. It looked like P. J. had crossed the line into police harassment, only to be proven right when Luke attempted to rape Jo. Later that night, Ben and
Evan Jones (
Ditch Davey) found Luke dead with an axe sticking out of his head, and P. J. standing over the body. He refused to help the investigation in any way, which left the Homicide Squad detectives with no choice but to arrest him for murder again. As Jo and her colleagues continued to investigate, they realised that P. J. was protecting someone, and there was only one person in the Darcy or Kenny families that he'd be willing to protect. With the killer found, the Homicide Squad dropped the charges against P. J. and he returned to duty once more. Later in the year, P. J.'s romance with Jo was in full bloom and they had agreed to get married and have children together. The engagement was short-lived, however, when their current case appears to be linked to one investigated by Maggie while she was still a junior constable. Tortured by nightmares of his first love, P. J. was forced to talk a woman out of taking her own life, admitting to her that you only get one great love, and that he had lost his. Jo overheard the conversation and broke off the engagement. Shortly after the collapse of the engagement, Jo was killed along with
Clancy Freeman (
Michael Isaacs) when the police station was destroyed by a bomb. Although the whole station was grieving, there was still the matter of bringing the culprit, or culprits, to justice, so P. J. joined Nick Schultz, now a detective in the Homicide Squad, and new colleague
Amy Fox (
Rachel Gordon), on the investigation. Over the course of the next few weeks, P. J. became concerned that Tom had become fixated on the Baxter family, who were prime suspects in the station bombing, and asks Tom's daughter to reason with him. The situation with Tom and the Baxters continued to deteriorate as Tom took the investigation into his own hands and headed to Melbourne to locate some information allowing Nick and P. J. to authorise a search and surveillance on the Baxter property, and the neighbouring land. This surveillance finally allowed them to catch the Baxters on drug charges, and eventually to charge them for bombing the station. After Nick returned to Melbourne, P. J. became concerned for Tom's mental health after hearing that his informant in Melbourne had been killed in an accidental explosion. P. J.'s final case in Mount Thomas came in August 2005 when a young teenage girl was found murdered. The girl had been returned to a couple claiming to be her family mere hours earlier by Sergeant
Mark Jacobs (
Geoff Morrell). Along with Amy, and her former lover
Garth Henderson (Andy Rodoreda), he delved into an investigation that revealed a truth far darker than any of them could imagine. During the course of the case, Garth offered Amy a spot on his new Cold Case Squad, but she declined and suggested that he offer the job to P. J. instead. Reflecting on the fates of the nameless victims of the Bidens, P. J. and Amy agreed to always fight for justice for the innocent victims of crime. As he prepares to leave Mount Thomas for pastures new in Melbourne, he shares fond farewells with Tom and Chris, but his most emotional farewell comes from Amy. == Relationships ==