A drama in six parts adapted from the book by TOM KEENE With BRIAN HAYNES with and 4: Martin now knows that the Caistor was equipped for spying. Hillmore, having uncovered Main's illicit operation, suspends him, unaware that Evans has gone to ground - with orders to kill Martin.
Script JAMES MITCHELL
Additional material ROBERT SMITH
Music and title song RICHARD HARVEY Studio sound
DAVID BAUMBER , ALASTAIR ASKHAM Designer MYLES LANG
Producer COLIN ROGERS
Directed by MICHAEL CUSTANCE BBC Pebble Mill