Thundercrack!

Marion Eaton

Mrs. Gert Hammond

George Kuchar

Bing / Medusa

Melinda McDowell

Sash

Phillip Heffernan

Chandler Wilson (as Mookie Blodgett)

Moira Benson

Roo

Rick Johnson

Toydy McNeil

Maggie Pyle

Willene Cassidy

Ken Scudder

Bond

Curt McDowell

Medusa / Gerald Hammond (as Pamela Primate)

Bernie Boyle

Señor Tostada