Fred MacMurray

Wilson Daniels

Jean Hagen

Freeda Daniels

Tommy Kirk

Wilby Daniels

Annette Funicello

Allison D'Allessio

Tim Considine

Buzz Miller

Kevin Corcoran

Moochie (Montgomery) Daniels

Cecil Kellaway

Professor Plumcutt

Alexander Scourby

Dr. Mikhail Andrassy

Roberta Shore

Franceska Andrassy

James Westerfield

Officer Hanson

Strother Martin

Thurm

Forrest Lewis

Officer Kelly

Ned Wever

FBI Chief E.P. Hackett

Gordon Jones

Captain Scanlon, Police Chief

Jacques Aubuchon

Stefano

Jack Albertson

Reporter (uncredited)