A former janitor becomes a potential key witness, but Peter and Sam struggle to track him down. Meanwhile, they examine a student trip to Costa Rica.

An interview with a former St. Bernardine student gives the guys confidence that they’re on the right track with their most recent theory.

Who is the Turd Burglar, and why did they do it? Are Peter and Sam still chasing the truth, or has it been right under their nose the whole time?

Peter and Sam highlight Kevin McClain and his friendships as they start to break down the version of events supported by the school and police.

As Sam and Peter comb through digital clues, they hope a technology glitch might open up some new leads. But a low-tech discovery leaves them reeling.

Peter and Sam travel to a prestigious private high school in Bellevue, Washington, to document the story of a filthy vandal called the “Turd Burglar.”

As Doc explains his version of American history to George, Sketchy and Skeezy reenact Doc’s stories about the Founding Fathers; Warren and the others go to the bakery that invented…

A local maskmaker is targeting Wesen to create Luchador masks that bestows great power to its wearer. As Nick, Hank, Monroe and Rosalee work to stop the killings, Capt. Renard…

While investigating a grisly murder, Nick and Hank get closer to uncovering the identity of the serial killer while Wu’s life is put in grave danger. Having turned down Monroe…