Robert Woolsey

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Self (archive footage)

Claude Horton

Pierre Potkin

Dr. Philip 'Painless' Pennington

Aloysius C. Whittaker

Newton

Roscoe Horne

Dr. Dudley

Self

Bob

Elmer Dugan

Alexander

Hercules Grub

Self

Himself

Slick Foster

Self

Spider Robbins

Self

Robert Woolsey

Zander Ulysses Parkhurst

Dr. J. Dockweiler Droop

Julius Caesar

Eggbert G. Higginbothom

Julius Swift

Himself / host

Prof. Cunningham

Ginger Dandy

Gilbert Simpson

Addington Ganzy

Ned Lovett