Peter Dyneley
Jeff Tracy / Professor Heinz Bodman (voice)
Acting
Shane Rimmer
Scott Tracy (voice)
Acting
David Holliday
Virgil Tracy (voice)
Acting
Matt Zimmerman
Alan Tracy / TV Reporter (voice)
Acting
David Graham
Gordon Tracy / John Tracy / Brains / Kyrano (voice)
Acting
Christine Finn
Tin-Tin Kyrano / Grandma Tracy (voice)
Acting
Jeremy Wilkin
Virgil Tracy / Operator Power / Tom (voice)
Acting
Ray Barrett
Colonel Harris / Colonel Benson / Rick O’Shea (voice)
Acting
John Tate
Solarnaut Camp (voice)
Acting
Charles Tingwell
International Space Control Commander (voice)
Acting
Sylvia Anderson
Professor Marshall (voice)
Acting