This season has six regular episodes, and the 1-hour Christmas special, in which Billy and Mandy try to save Santa Claus, who has been turned into a vampire. Characters that feature include Nigel Planter, trying to win the affections of a young witch; Principal Goodvibes, having a disastrous dinner with Billy, Hoss Delgado and Eris; Billy's parents, Harold and Gladys, becoming children again; Nergal, being a sore loser; the ghost of British poet Lord Byron, teaching Billy to be cool; the blue Schlubs (a parody of The Smurfs); and the ancient tentacled demon Cthulu. This season includes My Fair Mandy, the only episode in which Mandy willingly smiles, which causes unforeseeable consequences.
Streaming, rent, or buy The Grim Adventures of Billy and Mandy – Season 5:
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