Fred Gwynne as Herman Munster

Yvonne De Carlo as Lily Munster

Al Lewis as Grandpa

Jo McDonnell as Marilyn Munster

K.C. Martel as Eddie Munster

Sid Caesar as Dr. Dustin Diablo

Peter Fox as Det. Glen Boyle

Bob Hastings as Cousin Phantom of the Opera

Herb Voland as Police Chief Harry Boyle

Charles Macaulay as Police Commissioner McCluskey

Colby Chester as Michael

Joseph Ruskin as Paulo

Howard Morris as Cousin Igor

Ezra Stone as Dr. Lichtliter

Gary Vinson as Patrolman Larry

Sandy Champion as Patrolman Pete

Al White as Prisoner

Billy Sands as Shorty

Thomas Newman as Slim

Barry Pearl as Warren Thurston

Anita Dangler as Elvira

Dolores Mann as Mrs. Furnstrom

Hillary Horan as The Girl

Kenny Rhodes as The Boy

Read Morgan as Loader #2

Mickey Deems as Loader #1

Lou Richards as Boyfriend (uncredited)

Tom Willett as Halloween Party Guest (uncredited)

Michael McManus as Ralph