Head of MI5 is a fictional character portrayed by Jane Bertish in the TV series Black Mirror.
They appear in 1 episodes out of a total of 27 aired so far
Episodes1
Hated in the Nation
episode S3.E6 october 2016A police detective and her geeky young sidekick investigate a string of grisly murders with a sinister link to social media.- 1hs 30min