It's a fine line between safety and terror. Meet the rulers.
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.
Seasons
Series 1
6 episodes
May 13, 2002
Series 2
10 episodes
Jun 2, 2003
Series 3
10 episodes
Oct 11, 2004
Series 4
10 episodes
Sep 12, 2005
Series 5
10 episodes
Sep 17, 2006
Series 6
10 episodes
Oct 16, 2007
Series 7
8 episodes
Oct 27, 2008
Series 8
8 episodes
Nov 4, 2009
Series 9
8 episodes
Sep 20, 2010
Series 10
6 episodes
Sep 18, 2011
Trailer
MI5 Season 1 Trailer · Opens on YouTube
