Virgil Tracy / Hogarth (voice)
Virgil Tracy / Space Exploration Center President (voice)
Artillery Officer
James Nolan
Geoff
Virgil Tracy / Operator Power / Tom (voice)
Albert Bitterling
Dr. Melplash
Inspector Ronet
Kellman
Gidney
Freddie
Dr. Tulliver
Captain Andrew Lamont, MC
Drew Heriot
Harry Pilbeam
Dev Tarrant
Eric Mackay
Skydiver Navigator
Insp. Lars Bergen
Skydiver Navigator Lt. Gordon Maxwell
Doctor