On screen
Cast
8 credited performers
Basil Rathbone
Prof. Hartman, Lunar 7
Faith Domergue
Dr. Marsha Evans, Vega
Artwork unavailable
John Bix
John the Robot
Artwork unavailable
Marc Shannon
Character not listed
Artwork unavailable
Christopher Brand
Character not listed
Artwork unavailable
Lewis Keane
Character not listed
Artwork unavailable
Gennadi Vernov
Andre Ferneau - Sirius (archive footage)
Georgi Zhzhyonov
Hans Walters - Sirius (archive footage)