Callie goes baby-crazy when Mark fosters a demon orphan, and Twayne notices odd changes in his body.

Mark accidentally outs Randall as a zombie, and Leonard tries to identify a strange new creature.

Mark helps an old tree get its groove back, and Randall loses his favorite non-vital organ.

Mark walks a young couple through the trials of vampire love, and "Larry King disease" ravages New York City.

An obsessive-compulsive giant ape needs a job, and Callie struggles with her sudden attraction to Twayne.

Randall joins a zombie cult, and Mark performs psychiatric evaluations on his coworkers.

Mark helps Leonard with his magic wand issues, and Twayne Boneraper meets his two-dimensional soulmate.

Councilman Fitzpatrick sells his soul to Twayne, and Callie considers a cushy job in Hell.

Mark and Randall spend Halloween with Callie's family, and Leonard tries to find people to live in a haunted house.

Randall shambles his way onto an all-creature reality show, and a troll wrestles with riddle addiction.

Mark and Randall teach a sexed up robot self-control, and Callie mixes up Mark in a demonic ritual.

Manbird season hits New York City, and Mark finds himself the guardian of a fledgling separated from its flock.

Mark cares for an undocumented werewolf, and Leonard envies his famous magician brother, Christ Angel.

Randall tries to make a quick buck on the Soul Exchange by selling off Mark's immortal soul.

Randall is infected by horrifying plants at sea when Twayne throws a cruise ship party.

Lady Hoo-Ha, America's most adored pop star, goes zombie, and her many devoted fans follow suit.

Randall's new arm lands him on the DOI's intramural football team, and Callie pimps out Leonard.

After being drafted into Satan's dark army, Twayne and Mark must do their patriotic duty and end the world.

When his favorite TV series ends with a dumb twist, Grimes has a complete mental breakdown.

Mark accidentally reactivates Leonard's magical arranged marriage.

Mark hooks up with an old girlfriend to test his open relationship.

A Lilliputian arsonist escapes Mark's custody and finds an unlikely hiding place in Twayne's nose.

Callie makes an evil Mark clone to compete in the DOI bowling league tournament.

Grimes' judgmental mother rises from the dead, and a neglected Randall reconsiders his living situation.

Twayne quits after getting roasted at his DOI 10-year anniversary party, leaving Mark in charge.