Mutant Enemy Productions is a production company that was created in 1996 by Joss Whedon to produce Buffy the Vampire Slayer. The company also produced the Buffy spin-off, Angel, and his two short-lived science fiction series, the space western Firefly and his high-concept Dollhouse, produced by 20th Century Fox Television. Mutant Enemy also produced the internet series Dr. Horrible's Sing-Along Blog and the film The Cabin in the Woods.