First broadcast 12th April 1985.
Maggie Forbes arrive to join the new unit on the day that Jenny Kenwright, a member of the team, is killed while investigating a Russian trawler anchored in the Estuary.
Rosalyn Landor - Pru Standfast
Leslie Ash - Fred Smith
Michael Petrovitch - Andrei Andreyev
Richard Beale - Prinley
Christopher Priest - Sutcliffe
Richard Piper - Buck Hodder
John Pennington - Jeffrey Mortimer
Catherine Rabett - Jenny Kenwright
Don Warrington - Nigel Beaumont
Imogen Bickford-Smith - Caroline Cavendish
Christopher Godwin - Sir Thomas Notley
Christopher Rozycki - Anatoly Romanov
Stephen Churchett - Policeman
Tony Mathews - Howard Lewis
Elizabeth Counsell - Bella Lewis
Colette Stevenson - Sandra
Alisa Bosschaert - Molly Huggins (as Alisa Bossheart)
David Rolfe - Commander
Jill Gascoine - Maggie Forbes
Anthony Head - James Sinden
Nicholas Frankau - Henry Purvis
Eileen Nicholas - Mrs. Dunbar
Michael Melia - Bert Black
Steffanie Pitt - Receptionist
Norman Mann - Pomeroy
Alexei Jawdokimov - Balenkov
Jon Iles - Parsons
