First broadcast 17th September 1969.
At 3.55 am in London John Morrissey gets into a taxi to Scotland Yard. He is rushing to join a meeting about the planned arrest of three people who have broken the Official Secrets Act by selling information.
Wensley Pithey ... Detective Supt. Eden
Derren Nesbitt ... Det. Chief Insp. Jordan
Jennifer Wilson ... W. Det. Sgt. Helen Webb
Keith Washington ... Det. Const. Morrissey
Morris Perry ... Charles Moxon
David Garth ... Deputy Commander
Roger Rowland ... Det. Chief Insp. Felding
Donald Pelmear ... William Arthur Cowley
Sandra Bryant ... Christine Morris
Andree Evans ... Mrs. Cowley
Larry Cross ... Mr. Graham
Richard McNeff ... 1st Radio Operator (as Richard Mcneff)
Ray Barron ... 2nd Radio Operator
Edward Clayton ... Det. Sergeant
Susan Denny ... Woman Observer
Ivor Danvers ... Man Observer
John Livesey ... Harry
Anthony Colby ... 1st Detective
Tony Moore ... 2nd Detective
Peter Lund ... Night Watchman
Robert Wilde ... Policeman
Gene Sandys ... Mr. Greenaway
Brian Ellis ... Immigration Officer
Angela Ellis ... Det. Constable Brooks
John Wilder ... Det. Chief Insp. Whitney
