Aged nuclear physicist Professor Penmore is sent to prison for ten years for betraying rocket secrets to East Germany, but two people believe him innocent – his daughter Pat and his assistant Emma.
William Franklyn
Ian Lambart
Lana Morris
Emma Cresswell
Cyril Luckham
Det. Chief-Supt. Gage
Caroline Blakiston
Pat Penmore
Manning Wilson
Sergeant Rose
Patrick Troughton
Trev
Freda Bamford
Kitty
