| Allan Melvin | Aaron Boulder,Bony Hurdle,Superstone,Dr. Len Frankenstone,Sheriff Crag |
| Daws Butler | Ed Sullystone |
| Don Messick | Hoppy,Inventor,Rosencave,Brady,Gobie Gruesome,Man Thrown in Pit,Oscar,Sam,Shale,Announcer,Goblin Gruesome,House Cat,Rockhead,Auctioneer,Rimrock,Rockeo |
| Doug Young | Jay Bondrock,Clerk,Doctor,Grand Poobah,Hood,Capulet,Charlie,Draculaslab,Joe,Linko |
| Hal Smith | Santa Claus,Uncle Tex,Captain Blah,Adobe Dick,J. Giggles Flintstone,Creepers,General |
| Henry Corden | Big Sparkle,E.B.,Monte,Gildenstone,Gus,Rockeye,Shale,Stoolie Pigeon,Charlie,Digger,Ingomar,Ben Cartrock,Loudrock |
| Howard Morris | Doc,Weirdly Gruesome,Sailor,Jethro Hatrock,Squire,Al,Percy |
| James Darren | Jimmy Darrock (singing) |
| John Stephenson | Grand Poobah,Mr. Slate,Wrathrock,Tiberius,Nero |
| Mel Blanc | Voice Only |
| Mike Road | Go Go Ravine |
| Alan Reed | Voice Only |
| Lennie Weinrib | Jimmy Darrock (talking) |
| Naomi Lewis | Creepella Gruesome |
| Elliott Field | Thug,Manager |
| Jean Vander Pyl | Voice Only |
| Nancy Wible | Wednesday |
Technical Credits