Diana: A former officer is convinced that MI5 killed Princess Diana and is determined to force the team to prove it.
Regular Cast: Peter Firth (Harry Pearce), Rupert Penry-Jones (Adam Carter), Nicola Walker (Ruth Evershed), Anna Chancellor (Juliet Shaw), Raza Jaffrey (Zafar Younis), Hugh Simon (Malcolm Wynn-Jones)
Guest Cast: Miranda Raison (Jo Portman), Rory Macgregor (Colin Wells), Lindsay Duncan, James Scales, Johnnie Lyne-Pirkis
Writer: Howard Brenton / Director: Julian Simpson
Airdate: 10 Nov 2005 on BBC One
Series: Spooks Season 4 Episode 10
Show Info: The cases 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.