It's a trip down memory lane as the Doyles investigate the murder of an old client. But when the body count rises, Jake starts to question the whole case. Rose gets in hot water with the police and Des's budding romance with med student Chandra begins to rub Tinny the wrong way.

Jake and Leslie find themselves trapped while trying to stop a robbery in progress; When Mal discovers his son is missing, he and Des try to locate Jake before it's too late; Rose helps newly-returned Doyle daughter, Kathleen, with a problem from her past.

Jake Doyle is forced to help his high school nemesis track down missing money and win back the heart of his estranged wife; Des must decide between Chandra and Tinny once and for all; Rose and Kathleen take a step forward in their friendship.

Stuck in Her Majesty's Penitentiary, Jake's only chance of freedom lies in the capture of a wanted kidnapper; Mal and Rose investigate a case that hits close to home; Walter helps Kathleen with a parenting issue.

With the infamous Maurice Becker back in town, Jake Doyle must get to the bottom of Maurice's fabrications before he disappears again; a Quebec cop makes Leslie think twice about her single status; Des attempts to rebound after his break-up with Chandra.

As one member of a biased jury, Jake struggles to exonerate an innocent woman; Des uses his skills to assist Jake's investigation on the outside; A decision from Kathleen’s past puts the Doyles in danger.

When Des's dad is kidnapped after being released from jail, the Doyles must band together and save Jody Redmond before it's too late; Mal is distracted when he gets bad news about his old partner; Kathleen angers Tinny when she chooses an issue from the past over a case from the present.

Jake is hired to retrieve a priceless violin from a familiar con artist; Mal continues to dig into the death of his former partner; Kathleen is roped into another of George’s schemes.

The Doyles struggle to prove Mal's innocence when he's accused of murder, but end up digging a deeper hole; Kathleen gets some brotherly help with the George situation; Tinny discovers the identity of her father.

Jake and Mal are hired by a man to find his wife, who he claims is alive and well despite being reported dead for years; Tinny takes her investigation into Crocker a step further; Leslie embraces Jake as a confidante.

Jake's worst fears are realized upon discovery that Leslie has gone missing while working her dangerous undercover assignment, and now he's determined to find her at all costs. Meanwhile, an unlikely and suspicious client enlists Des's PI services.

Jake rushes to Leslie's side when the death of her father takes them to her hometown of Brigus, where a time of mourning turns into a full-fledged Doyle-style investigation when the death is ruled suspicious; Crocker formulates a plot to keep from being transferred to Vancouver.

Jake finds himself juggling multiple cases while looking into attempts made on the life of his ex-girlfriend; Tinny's relationship with her Uncle Jake is becoming strained due to her budding relationship with her father.

When Jake is kidnapped and nearly burned alive, he escapes and teams up with Mal to track down his would-be killers and make sense of the whispers that a mysterious "boss" is behind the plot; Monica builds a case against Jake and ropes Tinny into it.

The city is thrown into chaos when a prison break floods the streets with escaped cons, and a threat against Tinny makes it extremely personal for Jake; Unfazed by the warnings from her uncle and grandfather, Tinny oversees a police transport of seized guns and drugs.

With Tinny abducted at gunpoint by Maurice Becker, Jake and Crocker have no choice but to work together to get her back. While being held captive, Tinny attempts to get into Becker's head.

Jake's murder charge takes center stage; Leslie's job is on the line; Des is in the wrong place at the wrong time; Tinny is torn between her family and her job; the Doyle's have just 48 hours to solve a case.

Jake and Leslie fight for their lives; the Doyle's get help from an unexpected ally, but they must find evidence to clear Jake of murder.