Dale Robinette
— Robert Sands
Ralph Bellamy
— Miles Larson
Keenan Wynn
— Ely
Patrick Macnee
— Horatio Black
Robert Tessier
— Benjamin
Beth Specht
— Holly
Karen Specht
— Ivy
Ronnie Carol
— Marcia Buttercup
Stephen Keep Mills
— Harold Darling
William Bryant
— Harry Grebe
Marianne Marks
— Ming
Read Morgan
— Charlie
Harold Sakata
— Oriental Man
Ned Wilson
— Martian
Fil Formicola
— Bellboy
Bob Hastings
— Desk Clerk
Than Wyenn
— Assistant Manager
Walt Davis
— Third Technician
Jason Corbett
— Lab Technician
Bob Hevelone
— Fifth Technician
Davis Roberts
— Doorman
Elven Havard
— First Man
Cliff Carnell
— Second Technician
George Spicer
— Fourth Technician
Seth Foster
— First Technician