Bradford Dillman
Dobler
Priscilla Barnes
Claire
Daryl Haney
O'Neill
Mel Ryane
Barbara
Eb Lottimer
Seaver
Gregory Sobeck
Engel
Richard Young
Chadwick
Stephen Davies
Fernandez
John Lafayette
Shuttle commander
Michael Adams
Shuttle crewman
Karen Winograd
Shuttle crewwoman
Roger Corman
Corporate executive (uncredited)
