Jesse is critically wounded attempting to stop an auto theft. The investigation leads the team to an international auto theft ring supporting terrorists.
Charlie is unable to let a serial arsonist case rest even when he is in the hospital with a broken leg; working from his bed Charlie hopes to identify the arsonist before he strikes again.
After the owner of a construction company is found dead, Charlie and Rex track the killer to an underground casino. Major Crimes goes undercover to solve the case.
Charlie and Rex discover a wanted criminal has been living under a fake identity in St. John's for the past 20 years and end up in the cross-hairs when the man's past catches up with him.
When Officer Power and her K9 partner Rebel are violently attacked responding to a call about a warehouse break-in, Major Crimes is at the ready, but their hearts are heavy as the case hits close to home.
When a friend of Sarah's suffers an attack that leaves him in a coma, she travels to Toronto to confront his wife. Charlie and Rex find suspects closer to home.
When the creator of a fully self driving car is found dead behind the wheel, our human K-9 team have to discover the why and the who, which is made harder as the only witness is a the victims robotic dog companion.