MI-5

Peter Firth is the only cast member to appear in every episode of the show, as well as star in the follow-up film MI-5 Infiltration (2015). He does not, however, appear in Spooks: Code 9 (2008).

At numerous times throughout series 1 notably in "One Last Dance" and "Traitor's Gate" close-ups of intelligence files show that all the information is the same and all relates to Mary Kane's terminated pregnancy from episode 1 "Thou Shalt Not Kill".

The show does not have any end credits, ending each episode with a trailer for the next episode and only showing a BBC production information screen. It does not list any cast/crew. Just the caption "A Kudos Production".

The show runs for 60 minutes, and in the UK airs on channel BBC1 which shows programs without commercials. The show has been re-named MI-5 for American broadcasts on the A&E network, and each episode is edited down to approx 44 minutes to include commercials in a 60 minute time slot.

Featured in X Rated: Top 20 Most Controversial TV Moments (2005)