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.

After the boys start a fight, professor Foxtrot shows the group some messed up examples of dueling throughout history.

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

Professor Foxtrot crashes Jason's weekend plans in the most fiery and destructive way possible by using King Henry I of England and his children, King Charles VI of France and his Bal des Ardents, and the 1886 Eel Riots of Amsterdam, Netherlands as examples how parties can go very wrong very easily with dire historical consequences.

After catching their teacher in a lie, Mindy and the gang go on a historical tour of trickery, learning about three of the biggest historical frauds, George Psalmanazar who claimed to come from Formosa, Gregor Macgregor who sold settlers land in a fictional territory, and Mary Toft who claimed to have given birth to dead rabbits.

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

After the conflict with her arch-nemesis, Professor Foxtrot and the kids are left stranded in a void, but that doesn't stop Foxtrot from teaching the kids about messed up trials and executions such as Vatican's Cadaver Synod, the sadistic ancient Persian capital punishment known as scaphism or the boats, and the numerous trials throughout history where statues or animals were put on trial or brought in as defendants or witnesses. The season ends on somewhat of a cliffhanger.