Guest Stars John Newman as Spencer Bill Matthews as Davis Geoffrey Palmer as Masters Brendan Barry as Hospital Doctor Richard Steele as Sergeant Hart Paul Darrow as Captain Hawkins Fulton Mackay as Dr. Quinn Dave Carter as Silurian Peter Miles as Dr. Lawrence Harry Swift as Private Robins David Pollitt as Private Wright Roy Branigan as Roberts Paul Barton as Silurian Simon Cain as Silurian Gordon Richardson as Squire Nigel Johns as Young Silurian John Churchill as Silurian Dave Carter as Old Silurian Ian Talbot as Travis Nancie Jackson as Doris Squire Pat Gorman as Silurian Scientist Pat Gorman as Silurian Norman Jones as Major Baker Ian Conningham as Dr. Meredith Alan Mason as Corporal Nutting Peter Halliday as Silurian Voices Thomasine Heiner as Miss Dawson Bella Emberg as Nurse
