Agent
Cole
John Tracy / The Hood (voice)
Dwyer
Harry George Spalding
Maxwell
Mal
Farrell
Bill Perry
Cam
President of the Bench
Wal Moynihan
Commander Shore / Sub-Lieutenant Fisher / Titan (voice)
Jack Dunne
Harry
Old Cliff
Maurice Stubbs
Health Inspector Bennett
Michael Stacey
Brian Connor
F.C.O. Webster
Tarquin St John Smythe
Joe Blake
Commander Sam Shore / Sub-Lieutenant John Horatio Fisher / King Titan / Gadeth / Power Plant technician / Chidora / Maritamis / Fragil
Dr. McLeod
Frank
Old Burkey
Robert McCullough
Henry Fraser
Man at Pub / Two-Up Game (uncredited)
Bubbles
Cates
Australian
Colonel Harris / Colonel Benson / Rick O’Shea (voice)
John Tracy / The Hood / Lieutenant Burroughs / Patterson (voice)
Ramsden
Sgt Gorman
Geoffrey
Parnell
Bael
Narrator
Harry Benson
MacLeary
Jack Deakin
Sam Elliott
Bennett / Koquillion
Flt. Lt. Jack Collins
Bert West
Phil Burgh
Old Cliff Kirby
Knight
Barry Hill
Peter Thornton
Atom Sub Reefer Captain / TV Reporter (voice)
Jansen (voice)
Dr. Orchard (voice)
Colonel Harris / Colonel Benson (voice)
Frank Watson
John Tracy
Commander Sam Shore
Robert Carne
Alec Hamilton
Melville Hayden-Peters
Gov. Bligh
Colonel Forsythe
Willie Kinsall
Len Taylor
Harry Jarrett