character - Pierre Potkin

character - Claude Horton

character - Aloysius C. Whittaker

character - Dr. Philip 'Painless' Pennington

character - Roscoe Horne

character - Newton

character - Elmer Dugan

character - Bob

character - Dr. Dudley

character - Himself

character - Hercules Grub

character - Alexander

character - Self

character - Self

character - Spider Robbins

character - Self

character - Slick Foster

character - Julius Swift

character - Eggbert G. Higginbothom

character - Julius Caesar

character - Dr. J. Dockweiler Droop

character - Zander Ulysses Parkhurst

character - Robert Woolsey

character - Addington Ganzy

character - Gilbert Simpson

character - Ginger Dandy

character - Prof. Cunningham

character - Himself / host

character - Ned Lovett