Grimsburg

Jon Hamm

Marvin Flute (voice)

Erinn Hayes

Harmony Flute (voice)

Rachel Dratch

Stan Flute (voice)

Alan Tudyk

Dr. Rufis Pentos / Mr. Flesh (voice)

Kevin Michael Richardson

Detective Greg Summers (voice)

Greg Chun

Lieutenant John Kang (voice)

Martin Short

Otis Volcanowitz (voice)