56 minSeason 1 • Episode 5
LatestAs Stephen finally pieces together the conspiracy, Michael's illness worsens and another moves to tie up all the loose ends.
Reclusive mathematician Stephen Ezard returns to England after years in China, finds his brother's widow, and becomes entangled in a plot involving a new national database (TIA) and a terrorist scheme.
Acting
Cumberbatch's nervous breakdown is *chefs kiss*
Writing
Pre-Snowden tech paranoia that aged terrifyingly well
Production
2008 CGI that somehow still looks unsettling
Creator
Peter Berry
Trivia, insights & behind the scenes
Aired months before the real UK scrapped ID cards; Berry basically predicted the surveillance backlash.
Robert Carlyle's David Russell was rewritten to be more ambiguous after test audiences found him 'too likable'—they wanted you confused about who to trust.
GB
