Captain Spaulding
Otis B. Driftwood
Baby Firefly
Mother Firefly
Denise Willis
Jerry Goldsmith
Bill Hudley
Mary Knowles
Lieutenant George Wydell
Deputy Steve Naish
Tiny Firefly
Rufus 'RJ' Firefly Jr.
Grandpa Hugo Firefly
Rufus 'Earl' Firefly Sr.
Don Willis
Ravelli
Stucky
Killer Karl
Sheriff Frank Huston
Richard 'Little Dick' Wick
Gerry Ober
Skunk Ape Wife
Dr. Wolfenstein
Skunk Ape Husband
Lewis Dover
George Wydell
Dr. Satan
Dr. Wolfenstein's assistant (uncredited)