Charles Tingwell

as Gallery Visitor

as Winston Churchill

as Bob Fisher

as Lionel

as Minister

as Sam

as Premier Graham Berry

as John Conroy

as Martin

as Older David Collins

as Edward Brooks

as Cyril

as Reverend Loftus

as Andreas Borg

as Professor Alan Nordstrum

as Old Snowy

as Self

as Farmer

as Country Doctor

as Dr Harry McKay

as Lawrence Hammill

as Old Stanley

as Narrator (voice)

as Governor

as Hayes

as Bert Clarke

as Derek

as Charles

as Sandy Duncan

as Muirhead

as Dr. Rayment

as Max Bell

as Host

as Stewart Simpson Sr.

as Justice Masters

as Tramways supervisor

as Felix

as Hughie Geddes

as Narrator

as Helen's Father

as Uncle Charles

as Cassidy

as The Headmaster

as International Space Control Commander (voice)

as Lieutenant Dean / Carter (voice)

as Lt. Col. Denny

as Lieutenant Dean / Captain Brown / Agent 042 / Various Characters (voice)

as Sid Mitchell

as Jack Henderson

as Dr. Baker

as Harry Ferguson

as Dr. Miller

as Duncan Fraser

as Dr. Hammond / Quiz Host

as Doctor (uncredited)

as Redwood

as Dr. Fairburn

as Father

as Captain Beaver James

as John Mitchell

as Mr. Bennet

as Mark Blaine

as Jacko

as David Soames

as Captain Brown / Lieutenant Dean / Helicopter A42 Pilot (voice)

as Doctor Fawn / Captain Brown / Airport Operator / Agent 042 (voice)

as Macy (voice)

as Harris (voice)

as Marshall (voice)

as Lieutenant Belmont (voice)

as Doctor Fawn / Morgan (voice)

as Space General Paterson (voice)

as Captain Hassel (voice)

as Fairfield (voice)

as Base Controller (voice)

as Carter (voice)

as Lieutenant Dean (voice)

as Helicopter A42 Pilot (voice)

as Macey / 4th Policeman (voice)

as Dr. Tony Grant / Angry Young Man / Public Relations Officer (voice)

as Cpt. Dantor

as Alan Kent

as Johnson

as Captain Jaffe

as Captain Jaffe

as Capt. Dantor

as Mark Blaine

as Major Dryden

as Insp. Reg Lawson

as Inspector Craddock

as Pederson

as Inspector Craddock

as Inspector Craddock

as Albert Ringwood

as Inspector Craddock

as Dr. Neville

as Venner

as Conway

as Capt. Braddock

as Luke Parker

as Alan Dawson

as Jim Muldoon

as Doctor Alan Dawson

as Mr. Stevens

as Peter Merriman

as Lt. Harry Carstairs

as Alan Blake

as Matt

as Narrator

as John King

as Sam Curzon

as Terry Regan