Master Spy
A Russian scientist working for the British is suspected of being a "plant", sent to monitor nuclear secrets on behalf of the communists.
Stephen Murray
, June Thorburn
, Alan Wheatley
, John Carson
, John Bown
, Jack Watson
, Ernest Clark
, Peter Gilmore
, Marne Maitland
, Ellen Pollock
, Hugh Morton
, Basil Dignam
, Victor Beaumont
, Hamilton Dyce
, Michael Peake