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