From IMDb: Ray Barrett studied music and elocution and began acting at the age of eleven. He was the first actor put under contract by the Australian Broadcasting Corporation Drama section. He worked for several years on radio in Sydney, before working successfully in Britain between 1958 and the mid-1970s, when he returned to Australia. He has received two AFI (Australian Film Industry) awards as an actor.
Frank Watson
Knight
Willie Kinsall
Barry Hill
Melville Hayden-Peters
Len Taylor
Ramsden
Colonel Forsythe
Phil Burgh
Peter Thornton
Deborah, Duchess of Royston / Brophy / Fireflash Co-Pilot / Percy's Friend (voice)
Colonel Harris / Colonel Benson (voice)
Jansen (voice)
Atom Sub Reefer Captain / TV Reporter (voice)
Dr. Orchard (voice)
John Tracy
Robert Carne
Bert West
Commander Sam Shore
Flt. Lt. Jack Collins
John Tracy / The Hood (voice)
Walker
Harry Jarrett
Alec Hamilton
Gov. Bligh
Ramsden
Old Cliff Kirby
Man at Pub / Two-Up Game (uncredited)
Sgt Gorman
Cam
John Tracy / The Hood (voice)
Cole
Farrell
Old Cliff
Harry George Spalding
F.C.O. Webster
Parnell
John
Maxwell
Harry
Brian Connor
Australian
Wal Moynihan
Bill Perry
President of the Bench
Sammy
Jack Dunne
Maurice Stubbs
Mal
Commander Shore / Sub-Lieutenant Fisher / Titan (voice)
Old Burkey
Bubbles
Ray
Commander Sam Shore / Sub-Lieutenant John Horatio Fisher / King Titan / Various Characters (voice)
Dwyer
Michael Stacey
Tarquin St John Smythe
Cates
Robert McCullough
Sam Elliott
MacLeary
Frank
Jack Deakin
Health Inspector Bennett
Harry Benson
Bael
John Tracy / The Hood / Lieutenant Burroughs / Patterson (voice)
Dr. McLeod
Colonel Harris / Colonel Benson / Rick O’Shea (voice)
Agent
John Tracy / U.S.N. Sentinel Commander / Compère / 1st Site Control Policeman (voice)
Henry Fraser
Bennett / Koquillion
Geoffrey
Joe Blake
Narrator