Episode Overview
An environmental terrorist group is threatening to flood London if the government does not make a secret document public.
Guest Stars
Phoebe Nicholls
Janet Wheeler
Phyllis Logan
Diana Jewell
Cheryl Campbell
Deputy Prime Minister
Anthony Flanagan
Craig Fletcher
Tom Beard
Andrew Starkey
Charles Mayer
Michael Fitzgerald
Derek Hutchinson
Robert Cash
Stewart Wright
Alan Jackson, Barrier Guide
Michael Carter
Sir Maurice Clark