Homer Simpson (voice)
Marge Simpson (voice)
Bart Simpson (voice)
Lisa Simpson (voice)
Carl Carlson / Kirk Van Houten / Salesman (voice)
Lenny Leonard / Kent Brockman (voice)
Klaus Ziegler (voice)
Milhouse Van Houten (voice)
Guinea Pig Sanctuary Worker (voice)
(voice)
Waitress (voice)
Luann Van Houten (voice)