Billy Frankenstein

Jordan Lamoureux

Billy Frankenstein

Mary Elizabeth McGlynn

Sandy

Daran Norris

George

Peter Spellos

Bloodstone

Brian Carrillo

Frankenstein

Kristin Jadrnicek

Thelma

Vernon Wells

Otto

Griffin Drew

Fraulein

Tommy Kirk

Blind Monk

Kimberly A. Ray

Tour Guide

John Maynard

Froog

Robert Burke

Sheldon

Ernest Hardin Jr.

Steve

Rick Cadelli

Preston Strong

William Kuehn

Chauffeur

Mark Thomas McGee

Brain Vendor (as Mark McGee)