A married couple has been trying to get pregnant for 8 long years and it's taken its toll on them and their marriage. The wife now suspects the husband is having an affair with an attractive lady reporter. She kidnaps the reporter and holds her hostage at knifepoint. SRU is called in to defuse the situation. Sam and Jules continue to conceal their relationship but have second thoughts about moving forward.
A former SRU veteran turns up at headquarters and holes himself up in a safe room where he intends to commit suicide. He diverts the team with a false bomb threat and gets them to abandon the station. Ed gets wind of the suicide attempt and having trained under this veteran for many years, he is able to talk him down and out of the room.
Model prisoner Anton Burrows is up for parole but is denied when the victim’s family, the Amiris, speaks against him. Moments later, a ruthless gang incites a riot at Langstaff Maximum Security and takes the Amiris hostage. The SRU are called in and Ed is surprised to find an old friend acting as riot spokesman. Investigation leads the team to suspect the gang is plotting a break, but they discover the gang’s true agenda is much worse.
Team One must resolve a standoff at a seedy motel with a fugitive who has shot two police officers and taken a teenager, Paul Wilder, hostage. At first, Paul seems like a good kid in a bad situation, but as the team digs deeper it uncovers chilling secrets that reveal Paul is far from innocent. What began as a standoff ends as a desperate chase through the city’s sewer system, and it’s up to Parker to stop Paul from making a mistake that will change him forever. Meanwhile, Ed discovers that his cop brother Roy might have been responsible for one of the officers getting shot … and that his wife is, unexpectedly, expecting.
Maggie Perrello was the perfect mother until an addiction to prescription meds spiraled out of control. It cost Maggie a stint in jail, and the loss of her beloved daughters Becky and Riley into foster care. Now she’s out of jail, clean and sober, and yearns to bring her children home. When Maggie discovers that she can’t have her kids back, she turns desperate and kidnaps Becky and Riley. Team One answers the call. But when an unexpected complication threatens Becky’s safety, will Parker (Enrico Colantoni) be able to convince Maggie to make the ultimate sacrifice?
Team One arrives on the scene of a bank robbery where a man claiming to be Roger Finch has turned to desperate measures after trying to withdraw $40,000 from his account. But the case is not so simple: the Team discovers the bank robber is actually Garth Scarrow (J.D. Nicholsen), and the real Roger Finch (Hamish McEwan) has gone missing. Finch has been kidnapped by the bank robber’s daughter, Ava (Erin Karpluk) and her husband Mark (Warren Christie). But it's not his money they're after. As Finch's secret past comes to light, the couple leads the Team to a hospital showdown. Roger Finch holds the key to a child's life... and Ava and Mark will stop at nothing to save their son.
The Team receives an urgent call from Jules (Amy Jo Johnson) on her day off – she and her date Steve are trapped in a restaurant with a gunman (Aaron Poole) who’s shot a waiter and is now holding hostages and making incoherent demands. Team One works with Jules on the inside, fighting to calm the gunman down before the waiter dies, but its clear there’s more to this simple hostage-taking. Team One discovers that this delusional man is merely a pawn in a much more horrific act of terror, targeting a local mosque.
Team One grapples with life and death choices and tough decisions that leave viewers wondering if the team will ever be the same again. Dr. Larry Toth (guest star Victor Garber), a military psychologist and ‘team-breaker’, peers inside the heads of Team One individually, exposing deep secrets and faults. With the fate of the Team hanging in the balance, Ed’s (Hugh Dillon) wife Sophie (Janaya Stephens) goes into labour, Parker’s (Enrico Colantoni) leadership is questioned, Spike (Sergio Di Zio) and Wordy (Michael Cram) stare down the barrel of a life outside the SRU, and Sam (David Paetkau) and Jules (Amy Jo Johnson) must confront whether they’re willing to give up the job for each other. As Parker waits to hear the fate of his team, a devastating call comes into the station, involving one of his own.
Hijackers commandeer a passenger jet to bargain for a prisoner release. The lives of forty passengers and crew hang in the balance of negotiations over the prisoner, a relative of the terrorists. An ambitious passenger irks the hijackers, when she starts to text the police. Team One eventually storms the jet at the city airport. Stressed, Parker agonizes over shooting the hijackers.
During the season four finale, Team One races to a hospital when Fire Captain Simon Griggs interrupts the attempted murder of a badly burned firefighter. When they corner the suspect, the team learns he’s behind a series of deadly fires in the neighbourhood. Meanwhile Fire Captain Simon Griggs is forced to make a horrific choice – one that pushes him to the edge of revenge and suicide. Parker, wrestling with his own decision about his future on Team One, must convince this broken man to live.
Team One tears through the city in pursuit of James Mitchell, an armed and volatile man hunting for his ex-wife Michelle. James’s frantic daughter May fills the team in on the history of violence and abuse that she and her mother have escaped. As the team corners James on a hotel rooftop, a shocking turn forces Ed into taking a tragic shot he wasn’t prepared for.
The Team is called to an office building where Dr. Jason Alston has been taken at gunpoint. As the team clears the building, the gunman gets the drop on Sam, forcing him and Jason into a van and revealing a critically injured child. Sam helps Jason stabilize the child’s condition, and discovers a history between Jason and the gunman – just as armed men close in, gunning for Brendan and trapping Sam and Jason in the crossfire.
Team One locks down a robbery in progress at a busy downtown bank only to discover Sarah and Maddie – two young con artists who are under the thumb of dangerous ‘mentor,’ Pete Joris. When Pete turns violent, Sarah is determined to cut him from their lives – while Jules and the Team race to stop her before she becomes his next victim.
Team One is stunned when someone hacks into their ultra-secure computer system -- to show the team the video of a crime in progress. The team speeds after the thieves, who've stolen an eighteen-wheeler full of volatile chemicals. Ed is forced to take a risky sniper shot as Spike tracks down the hacker who set Team One on the case. Untangling the hacker’s motives, Spike finds a young man who's put his life at risk to rescue the girl he loves.
In part one of the series finale, Team One faces it’s most chilling adversary yet: a brilliant serial bomber who takes an entire city hostage. They are put to the ultimate test in this shocking conclusion, changing Team One forever.
The second of the two-part series finale, and Team One faces a serial bomber who takes an entire city hostage. They are put to the ultimate test in this shocking conclusion, changing Team One forever.