Paul Rugg
Freakazoid (voice)
Ed Asner
Sgt. Cosgrove (voice)
Tress MacNeille
Debbie Douglas (voice)
Jeff Bennett
Cave Guy (voice)
David Kaufman
Dexter Douglas (voice)
David Warner
The Lobe (voice)
Frank Welker
Mr. Chubbikins (voice)
Maurice LaMarche
The Brain (voice)
Jonathan Harris
Professor Jones (voice)
Ricardo Montalban
Armondo Guitierrez (voice)
Googy Gress
Duncan Douglas (voice)
Larry Cedar
Oblongata (voice)
Craig Ferguson
Roddy MacStew (voice)
Jim Cummings
Semiconductor (voice)
Rob Paulsen
Francois (voice)
Jess Harnell
Wakko (voice)
Dorian Harewood
Singer #4 (voice)
Randy Crenshaw
Attendant #1 (voice)
Ed Gilbert
Professor Heiny (voice)
Brian George
Doc (voice)
Stephen Furst
Stan Freberg
Carl Ballantine
Mark Hamill
Kenneth Mars
Dr. Hunterhanker (voice)
Elisabeth Moss
Kathy (voice)
Scott Menville
Toby Danger (voice)
Granville Van Dusen
Dash O'Pepper (voice)
Mary Scheer
Sandra Danger (voice)
Don Messick
Dr. Vernon Danger
Julie Bernstein
Singer #2 (voice)
Richard Moll
Vorn the Unspeakable (voice)
Andrea Martin
Female Neighbor (voice)
Tim Curry
Dr. Mystico (voice)
Leonard Maltin
Himself (voice)
Corey Burton
Invisibo (voice)
John Rhys-Davies
Professor Beasthead (voice)
Dave Coulier
Teenage Boy (voice)
Norm Abram
Norm Abram (voice)
Clive Revill
Hermil Sioro (voice)
