The Creeping Unknown [Portuguese]

Brian Donlevy

Prof. Bernard Quatermass

Jack Warner

Inspector Lomax

Richard Wordsworth

Victor Carroon

Margia Dean

Mrs. Judith Carroon

Thora Hird

Rosemary 'Rosie' Elizabeth Wrigley

Gordon Jackson

BBC TV producer

David King-Wood

Dr. Gordon Briscoe

Harold Lang

Christie

Lionel Jeffries

Blake

Sam Kydd

Police Sergeant Questioning Rosie

Jane Aird

Mrs. Lomax

Margaret Anderson

Maggie

Jane Asher

Little Girl

Harry Brunning

Night Porter

Ken Buckle

Police Driver

Eric Corrie

Maggie's Boyfriend

Edward Dane

Station Policeman

Gron Davies

Charles Green