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 faces the consequences of his actions; Sloan makes an important decision about her future.

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 start trailing a potentially cheating husband to find he deeply loves his wife but is in deep trouble with some menacing criminals and smugglers; as Nikki moves forward with her new beau, Jake and Leslie take it to the next level.

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.

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.

The Doyles are hired to recover a missing item belonging to a beautiful client; Nikki asks Jake a favour he wants nothing to do with; Tinny enlists Des in keeping a secret.

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.

Sergeant Jake Doyle is assigned to protect a mob informant but when a mysterious group of men impede him, Jake finds the tables turned - himself the target of a manhunt.

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.

After a ransom drop goes bad, Jake and Mal fight against the clock and an unpredictable man to find the location of a kidnapped girl; Tinny shares some shocking news; Leslie slips deeper into her risky assignment.

Jake sets out to find the true identity of a beautiful amnesiac who stumbles across his path and ends up fighting off her two stalkers; Martin Poole refuses to leave town and wreaks havoc in Rose and Mal’s relationship; and Leslie gives Jake the cold shoulder.

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.

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.

Jake and Mal are given no choice but to help an escaped convict prove his innocence, and they get a glimpse of the drug trade in the city in the bargain. Tinny's curiosity about her father grows. Jake finds out why Leslie's been off the radar.

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.

The extended Doyle family shows up on the doorstep unannounced and in huge trouble, leaving Jake and Mal to tangle with some formidable gangsters from across the pond.

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.

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.

When Des finds himself in a very bizarre and compromising position, the Doyle clan works overtime to get him off the hook; Jake meets someone who has been complicating Allison's life; Tinny and Des start coming to terms with their feelings for each other.

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.

A young woman comes to The Doyles with one case – to find her unknown biological father – but they end up solving three; Jake is distracted by Leslie while trying to extract himself from Nikki.

The Doyles show their sentimental side as they help Jake’s high school girlfriend run off into the sunset with her new husband, who’s running from both bad guys and good guys to just get away; Rose’s past comes back to haunt her in the form of her ex-con husband, while Leslie weighs whether or not she wants Jake in her future.

The Doyles help a close family friend beat a manslaughter charge despite the fact that he refuses to defend himself; Jake’s relationship with his ex-wife, Nikki, is heating up when it should be cooling down – and Leslie might be the perfect distraction.

When a dubious chip truck owner notices his truck is missing - along with his driver/best buddy - he cons Jake into taking the case; Martin really crosses a line with Rose and she takes matters into her own hands; and Jake’s divorce becomes final and he’s happy to tell Leslie that he’s now a free-agent. But Leslie’s just been bumped up the ladder with a promotion to Sergeant, and her eye is on the job, not Jake Doyle.

Jake searches for evidence to prove his innocence; Mal and Rose question Doyle's return.

The Doyle's try to keep their stories straight during a police interrogation; Leslie and Jake keep secrets; Des and Tinny disagree on their relationship.

A new case gets Jake and Mal caught in the middle of a daylight-kidnapping gang, which they quickly discover is all just a game. The game takes a sinister turn when one of the players turns up dead, and it's up to the Doyle P.I. Agency to find the killer in a very real murder. Des practises his investigative skills by tailing Tinny and finds out some very disturbing information.

Jake crosses paths with cop Bill Murdoch (Yannick Bisson) on a strange case.

Leslie resists meeting with the therapist; Mal and Jake keep a secret from Rose.

The Doyles work with Jimmy and Wolf to protect a witness; Jake and Saul face off again; Rose discovers something about Sloan's past; Jake gets shocking news.

Jake traces a sketchy money trail; Leslie faces some conditions upon her return to work.

Leslie offers to help Jake and the Doyles.

When a crazed bomber takes over the police station, it's up to Jake to try and diffuse the situation from the inside before the hostage crisis can turn fatal; Trapped outside, Leslie leads the RNC command post with Jake's life hanging in the balance.

Jake tracks down a hustler; Leslie becomes suspicious of a fellow officer.

The Doyles take on a cold arson case for Mal’s old flame to find out the tragic truth of what really happened when a girl died in a bar fire; Jake and Leslie are finally starting to connect when Jake discovers he might be… a daddy?

When Mal suddenly leaves town and lends Jake out to be shadowed by a pompous crime novelist looking for inspiration, Jake’s entire life, including his constant relationship woes, is put under the authorial microscope; a simple cheating spouse domestic case turns out to be something far more devious than it first appears; and Jake, expecting the return of his father, gets an unwelcome surprise when it’s not Mal standing in the kitchen to greet him but his troubled older brother, Christian.

An old nemesis interferes as Jake pursues a criminal.

Jake stumbles upon a murder in the woods during a fishing trip with Mal and Des.

It's matrimony -- Doyle style -- as Jake and Mal are tasked with finding the person responsible for sabotaging an upcoming wedding; Mal and Rose fix a bump in the road in their relationship as Jake and Allison hit a stride in theirs; Des comes to Tinny's rescue but ends up exploding her plans in the process.

Jake and Mal investigate a hit-and-run and encounter a slippery criminal couple; Rose has a run-in with familiar ghosts from her past; Des discovers that Tinny's trip to London didn't go as expected. Guest star: Shannon Tweed

Jake and Mal contend with a hit man.

Jake and Mal chase after a mysterious and troublesome woman.

Jake must solve a case while facing the facts about Leslie; the Doyle's try to adjust.

Jake is forced to team up with a former partner; Leslie must step up when a colleague is attacked.

When a member of the Doyle clan is in danger from both the police and a killer, the family comes together to stay safe.