Buck Rogers (archive footage) (as Larry 'Buster' Crabbe)
Wilma Deering (archive footage)
'Buddy' Wade (archive footage)
Capt. Rankin (archive footage)
Killer Kane (archive footage)
Prince Tallen (archive footage)
Dr. Huer (archive footage) (as Montague Shaw)
Aldar (archive footage)
Air Marshal Kragg (archive footage)
Capt. Lasca (archive footage)
Lt. Lacy (archive footage)
Capt. Roberts (archive footage)
Lieutenant Patten (archive footage)
Scott (archive footage)
Kane Officer (archive footage) (uncredited)
Professor Wade (archive footage) (uncredited)
Dynamo Room Guard (archive footage) (uncredited)
Dirigible Captain Breaden (archive footage) (uncredited)
Army Official (archive footage) (uncredited)
Lt. Carson (archive footage) (uncredited)
Kane's Hednchman (archive footage) (uncredited)
Saturian Councilman (archive footage) (uncredited)
Kane Soldier (archive footage) (uncredited)
Huer's Lab Assistant (archive footage) (uncredited)
Councillor Krenko (archive footage) (uncredited)
Reporter (archive footage) (uncredited)
Hidden City Air Controller (archive footage) (uncredited)
Wilma's Cell Guard (archive footage) (uncredited)
Cartwright (archive footage) (uncredited)
Lab Man (archive footage) (uncredited)
Captain Martin (archive footage) (uncredited)
Kane Captain (archive footage) (uncredited)
Patrol Ship 74 Pilot (archive footage) (uncredited)