Toby is affected by post-traumatic stress disorder after shooting and killing a suspect. Meanwhile, the IIB tries to stop an assassination.

An investigation into the murder of a Latin crime boss hits a snag.

An actor is murdered during the filming of a supposedly cursed horror movie.

Toby and Michelle join forces with a con artist in order to hunt down a human trafficker who's giving them the slip.

A British spy is murdered, and the victim's activity on an online dating site may be linked to the crime.

Toby uncovers a web of corporate espionage and blackmail while investigating a mysterious woman's death.

Toby is a witness to the death of a promising young mixed-martial-arts fighter.

Toby and Michelle are faced with a potential conspiracy after the key witness in a mob-related murder trial is killed.

Toby goes undercover in order to chase thieves who are pretending to be police officers.

Toby and Michelle search for a killer who may have stolen national defense secrets.

Toby's girlfriend suspects that her coworker was targeted after writing a derisive exposé.

Toby and Michelle deal with a difficult new police superintendent while tracking a gang of dangerous robbers.

The fourth season opens with Toby and Michelle investigating a string of high-tech thefts in Vancouver, where Toby encounters an ex-girlfriend who may be linked to the main suspect.