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

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

Jake and Mal chase after a mysterious and troublesome woman.

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.

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 crosses paths with a hot-headed cop.

Leslie's informant is murdered.

Jake's location is uncovered in the Season 5 premiere. Later, Tinny oversteps her bounds.

An old nemesis interferes as Jake pursues a criminal.

A wrongfully convicted murderer gets out of prison and offers the Doyles a generous payday if they find the real killer; Jake finds out the truth about Nikki’s pregnancy.

A grieving widow hires the Doyles to find out why her husband left a generous sum of money in his will to a woman she’s never heard of. Rose continues to battle with Martin over their divorce while Mal formulates a plan to get Poole out of their lives for good; and Leslie and Jake hit a comfortable stride as friends and colleagues - just as his divorce from Nikki becomes final.

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 Mal contend with a hit man.

Sloan goes missing and Patti seeks Jake's help in finding her, but he has trouble remembering what happened the night before. Meanwhile, Mal and Des get tangled up with a dangerous thug; and Jake and Leslie make a decision regarding their future.

Jake pursues an art thief; Sloan struggles to find her place.

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.

Tensions are at an all-time high with Jake's older brother Christian back in town and the Doyles are on a case involving Walter's soon-to-be brother-in-law.

After getting a call from his brother Christian, Jake must help prove him innocent in a shady murder case. Meanwhile health issues creep up on Mal and Des along with Tinny take on a case by themselves.

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.

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.

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

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

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

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.

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.