Fulton Mackay

Dr. Quinn

Norman Jones

Major Baker

Thomasine Heiner

Miss Dawson

Paul Darrow

Captain Hawkins

Nancie Jackson

Doris Squire

Gordon Richardson

Squire

Pat Gorman

Silurian

Nicholas Courtney

Brigadier Lethbridge-Stewart

Peter Halliday

Silurians (voice)

Peter Miles

Dr. Lawrence

Malcolm Hulke

Writer

Carey Blyton

Original Music Composer

Barry Newbery

Production Design

Barry Letts

Producer

Timothy Combe

Director