Basil Rathbone

Prof. Hartman, Lunar 7

Acting

Faith Domergue

Dr. Marsha Evans, Vega

Acting

John Bix

John the Robot

Acting

Gennadi Vernov

Andre Ferneau, Sirius (archive footage)

Acting

Georgi Zhzhyonov

Hans Walter, Sirius (archive footage)

Acting

Georgiy Teykh

Dr Kern, Vega (archive footage) (uncredited)

Acting

Vladimir Yemelyanov

Cmdr. Brendan Lockhart, Sirius (archive footage) (uncredited)

Acting

Yuriy Sarantsev

Allen Sherman, Vega (archive footage) (uncredited)

Acting

Marc Shannon

Acting

Christopher Brand

Acting

Lewis Keane

Acting