Callie's psychotic, prankster ex-boyfriend escapes from an asylum and wreaks havoc on Mark's life.

Callie must care for her younger, hotter demon sister, who happens to be engaged to Twayne.

A rabid Bat Boy takes a bite out of Mark, transforming him into New York City's latest superhero.

Twayne and Callie build a summer camp to cover up their raid on a wizard training ground.

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

Callie is promptly promoted after turning into a man, causing strife in her relationship with Mark.

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

Mark accidentally reactivates Leonard's magical arranged marriage.

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.

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.

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

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

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

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

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