Art Carney

as Frank

as Henry Coogan

as Santa Claus

as Bernard Crawford

as Morgens

as Irv Manders

as Harry Truman

as Narrator / Blarney Kilakilarney (voice)

as Charlie Pickett

as Corpus C. Redfish

as Abe

as Al

as Pignose Moran

as Marcus

as Sergeant

as Saun Dann

as Dr. Blaine / Dr. Bowers

as Dr. Amos Willoughby

as John Stark

as Ira Wells

as J.J. Fromberg

as Thornton Alman

as Harry Coombes

as Joey Friedlander