Professor Foxtrot proves the power of parasites, from flesh-burrowing maggots to tongue-eating lice.

River's reckless drug habit prompts Professor Foxtrot to demonstrate other ways to "treat yourself."

Mindy learns that animal romance can be less "The Notebook" and more "The Texas Chainsaw Massacre."

Feeling like a stupid failure, Brad teleports to the 1940s and discovers he's in good company.

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The class observes adorable critters along with necrophilia, infanticide, and other horrors.

Foxtrot crashes Jason's weekend plans in the most fiery and destructive way possible.

After catching their teacher in a lie, Mindy and the gang go on a historical tour of trickery.

Foxtrot invokes worst-case examples to deter the kids from a risky rescue mission.

Stranded in a strange world, the class gets a lesson in ancient trials and tortures.