Reparto (por orden de créditos)
Maurice LaMarche
Inspector Gadgetvoice
Frank Welker
Dr. Clawvoice
Cree Summer
Pennyvoice
Holly Berger
Penny (segment "Gadget's Gadgets" and "The Capeman Cometh")voice
Townsend Coleman
Cpl. Capeman (segments "The Capeman Cometh" and "Gadget's Gadgets")voice
Don Adams
Inspector Gadget (segments "The Capeman Cometh"voice
Hadley Kay
Ballah (segment "Prince of the Gypsies")voice
Melleny Melody
Vespella (segment "Prince of the Gypsies")voice
Greg Duffell
M.A.D Agent (segment "Prince of the Gypsies")voice
Andy Goldberg
M.A.D Ninja (segment "The Capeman Cometh")voice
Louis Nye
M.A.D Agents (segments "The Capeman Cometh" & "Gadget's Gadgets")voice
Rita Taggart
M.A.D Nurse (segment "Gadget's Gadgets")voice
Don Francks
King (segment "Prince of the Gypsies")archiveFootage,voice
Dan Hennessey
Chief Quimby (segment "Prince of the Gypsies")voice