Prof. Hartman, Lunar 7
Basil Rathbone
Dr. Marsha Evans, Vega
Faith Domergue
Lewis Keane
John the Robot
John Bix
Andre Ferneau, Sirius (archive footage)
Gennadi Vernov
Hans Walter, Sirius (archive footage)
Georgi Zhzhyonov
Dr Kern, Vega (archive footage) (uncredited)
Georgiy Teykh
Cmdr. Brendan Lockhart, Sirius (archive footage) (uncredited)
Vladimir Yemelyanov
Allen Sherman, Vega (archive footage) (uncredited)
Yuriy Sarantsev
Marc Shannon
Christopher Brand
Executive Producer
Roger Corman
Associate Producer
Stephanie Rothman
Director
Curtis Harrington
Writer
Producer
George Edwards
Director of Photography
Vilis Lapenieks
Original Music Composer
Ronald Stein
Editor
Leo H. Shreve
Set Decoration
Leon Smith
Makeup Artist
William Condos
Hairstylist
George Spicer