[2] He was also a radio scriptwriter as well as a narrator in feature films and for special entertainment and educational projects, such as the original Spaceship Earth and Universe of Energy rides at Epcot at the Walt Disney World Resort in Florida.
[8][1] His first credited role came in 1943, when he served as the announcer for "The Last Will and Testament Of Tom Smith", a radio episode of Free World Theatre, which was produced and directed by Arch Oboler.
[citation needed] Perrin was also a regular guest star on the radio version of Gunsmoke, and he wrote or co-wrote five scripts for that popular Western series between 1959 and 1961.
[11] He played characters in a variety of other series, including Peter Gunn, Black Saddle, Have Gun – Will Travel, Mackenzie's Raiders, The Untouchables, Going My Way, Perry Mason, Adam-12, The F.B.I., and Mannix.
Those characters include the Ape Man, Carl the Stuntman, Pietro, the Puppet Master, Dr. Najib, the Snow Ghost, Mr. Leech, Yeti, Fu Lan Chi, among others.
Perrin was the voices of The Phantom Racer, Junkyard Watchman, Ken Rogers, Anthos and John Thomas on The Scooby-Doo Show.
Perrin voiced Red Ghost, Silver Surfer, Professor Gamma and The Demon on Fantastic Four (1967 TV series).
Perrin voiced Ming the Merciless on the 1982 television film Flash Gordon: The Greatest Adventure of All produced by Filmation.
Other Hanna-Barbera shows Perrin provided additional voices on are the live-action and animated fantasy television series The New Adventures of Huckleberry Finn as Castway Charlie, Centaur, Doorgah, High Priest, Rabbit and Chief, Help!...
as Professor Neilsen Rockabuilt, Inch High, Private Eye; These Are the Days; Clue Club; Jabberjaw; Captain Caveman and the Teen Angels as Mummy, Brackish and Professor Pryce; Jana of the Jungle; Super Friends (1980 TV series) as Sailor; The Smurfs; and The Greatest Adventure: Stories from the Bible.