Characters played by Kieron Moore
Dr. Peter Blood
Characters played by Hazel Court
Nurse Linda Parker
Characters played by Ian Hunter
Dr. Robert Blood
Peter's Father
Characters played by Kenneth J. Warren
Sgt. Cook
Characters played by Gerald Lawson
Mr. G. F. Morton
Characters played by Fred Johnson
Tregaye
Characters played by Paul Hardtmuth
Prof. Luckman
Characters played by Paul Stockman
Steve Parker
Linda's Husband
Characters played by Andy Alston
George Beale the Tunnel Expert
Characters played by Ruth Lee
Girl
Characters played by John Ronane
Hanson
Characters played by Pat Ryan
Villager