When Lassiter maintains that a shark attack is really a planned murder to much skepticism at the department, Shawn and Gus eventually take pity on him and set out to help him prove the crime.

Shawn and Gus are thrilled when they're asked to join an elite security company, but the team to which they are assigned are not quite as thrilled with their unconventional techniques and the affect it has on their latest assignment: preventing the assassination of a billionaire executive.

A lab has lost one of their infectious agents, and Shawn and Gus are tasked with finding it before it can be unleashed on the public.

Shawn stumbles into a situation involving Juliet's ex-boyfriend from college, a mobster who may have been wrongfully convicted, witness protection and a very cold case.

It's a busman's holiday when Abigail's river trip with Gus and Shawn turns deadly after one of the group takes a tumble off the raft.

Abigail is disappointed when Shawn accepts a case at the Army base instead of going on a date with her, but he and Gus are intrigued by a death they believe shouldn't have been ruled a suicide. Unfortunately it may also implicate Juliet's brother.

Shawn finds himself central to a criminal enterprise when he interrupts a brother preparing for a robbery, and then ends up a hostage for the other brother when all his well-laid plans are ruined by one psychopathic action.

Shawn and Gus take the case of a man who is sure he's a werewolf on a path to killing humans, but far from protecting mankind from a furry beast they find themselves protecting the man from a murder charge.

Gus' reunion with two members of his college a cappella quartet, with whom he's estranged, at the funeral of the fourth leads to a case for Shawn when they ask him to prove that "Diddle" was murdered.

An actor in a local Bollywood theatre production takes a vow of celibacy when he believes he has proof his family's curse is manifest in him. Shawn and Gus, who are true believers in love, vow to find out why the man's girlfriends keep getting hurt and stumble upon a motive that may be close to home.

Shawn believes there's more than a robbery afoot when the local cop bar is shot up during a celebration for Officer McNab. The problem is convincing Lassiter, who may be the target.

When a college girl at a Catholic university commits suicide, Gus and Shawn are brought in because one of the professors at the school believes the girl was demon-possessed.

Lassiter reluctantly asks Shawn and Gus for help when his surrogate father, sheriff of Sonora, thinks a ghost is wreaking havoc in his town. And even though this Wild West re-creation town is bigger on show than facts, it turns out a real crime is being planned and the murder of the Sheriff's business rival is only the beginning.

A billionaire hedge fund manager asks Shawn and Gus to find his murderer – a last request Shawn can't resist. So he and Gus step into a world of privilege that's rivaled only by the depths of betrayal it contains.

Shawn and Gus spot an art thief whom Lassiter has been trying to arrest for years. So, although they are on a skiing vacation in Canada, they appeal to the local constabulary with mixed results: someone gets axed, another finds himself interrogated and Pierre Despereaux may get away scot-free, once again.