Spooks - Season 9 - Eps 8: Cat and Mouse
The team faces their toughest challenge ever: tracking down Lucas North, their Section Chief, friend and one of the best agents MI5 has ever had. Harry decides the team are too close, and brings in a specialist to help with the hunt. But it will not be easy to find a man who has nothing left to lose, and as the search becomes increasingly desperate, Harry and Lucas become embroiled in a deadly game of cat and mouse.
About Spooks

Title: Spooks
First Air Date: 2002-05-13
Last Air Date: 2011-10-23
Status: Ended
Rating: 7.6/10 (from 126 votes)
Language: EN
Seasons: 10
Total Episodes: 86
Network: BBC One
Genres: Drama, Action & Adventure, Crime
Production Companies: BBC, Kudos
Synopsis
Tense drama series about the different challenges faced by the British Security Service as they work against the clock to safeguard the nation. The title is a popular colloquialism for spies, and the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a highly secure suite of offices known as The Grid.
Cast

Peter Firth
Harry Pearce

Nicola Walker
Ruth Evershed

Max Brown
Dimitri Levendis

Lara Pulver
Erin Watts

William Hope
Jim Coaver

Alex Lanipekun
Ben Kaplan

Geoffrey Streatfeild
Calum Reed

Tom Weston-Jones
Sasha Gavrik

Alice Krige
Elena Gavrik

Jonathan Hyde
Ilya Gavrik