This is the production company of Joss Whedon, creator of Buffy the Vampire Slayer, Firefly, and Angel. It is named after Whedon's first typewriter he got at 15, as revealed in an interview on disc three of the first season of Buffy the Vampire Slayer.
Logo: In front of a white piece of display board, we see a paper cutout of an angry-looking monster (animated by Joss Whedon himself) moving from right to left. The text "MUTANT ENEMY INC." is scrawled onto the display board in a "pointy" style.
Trivia:
Variants:
Technique: Digital cut-out animation.
Audio: Joss Whedon saying "Grr! Argh!" in a very unconvincing manner.
Audio Variants:
Availability: It appeared on Buffy the Vampire Slayer and its spin-off, Angel, the short-lived cult hit Firefly, and Dollhouse. It was also seen on Dr. Horrible's Sing-Along Blog and Marvel's Agents of S.H.I.E.L.D.
Logo: Just a close up shot of Joss Whedon's first typewriter, with the "7" and "&" keys slightly visible. On the typewriter is a piece of black tape with the words "MUTANT ENEMY" on it. There are small tread marks next to the tape.
Technique: None.
Audio: The closing theme.
Availability: This debuted on the HBO series The Nevers.