The lovable Munster family finds their placid world turned into turmoil by the diabolical Dr. Diablo, the mastermind of an art heist using monster robots, including clones of Herman and Grandpa.
Herman Munster
Fred Gwynne
Lily Munster
Yvonne De Carlo
Grandpa
Al Lewis
Marilyn Munster
Jo McDonnell
Eddie Munster
K.C. Martel
Dr. Dustin Diablo
Sid Caesar
Det. Glen Boyle
Peter Fox
Cousin Phantom of the Opera
Bob Hastings
Police Chief Harry Boyle
Herb Voland
Police Commissioner McCluskey
Charles Macaulay
Michael
Colby Chester
Paulo
Joseph Ruskin
Cousin Igor
Howard Morris
Dr. Lichtliter
Ezra Stone
Patrolman Larry
Gary Vinson
Patrolman Pete
Sandy Champion
Prisoner
Al White
Shorty
Billy Sands
Slim
Thomas Newman
Warren Thurston
Barry Pearl
Elvira
Anita Dangler
Mrs. Furnstrom
Dolores Mann
The Girl
Hillary Horan
The Boy
Kenny Rhodes
Loader #2
Read Morgan
Loader #1
Mickey Deems
Boyfriend (uncredited)
Lou Richards
Halloween Party Guest (uncredited)
Tom Willett
Ralph
Michael McManus