On his way to MI6, Calum Reed (Geoffrey Streatfeild) is mugged, and his laptop containing the identities of five high level assets is stolen, one of which is Martha Ford (Lydia Leonard), who is close to one of Gavrik's companies. Several attempts to find the muggers prove difficult as they are highly resourceful. They manage to decrypt the first file and leak it to the Internet; asset one John Grogen is found dead. Martha's identity is leaked next, though Erin is able to bring her to a safe house before she can be killed by the Russians. However, Erin is later ordered to break all ties with her under the pressure from Gavrik. Harry meets with Elena to tell her that somebody is posing as him. He later asks Ruth to look up Central Intelligence Agency (CIA) deputy director and Cold War colleague Jim Coaver (William Hope), believing he is the imposter. After returning home Tariq Masood (Shazad Latif) discovers the identity of one of the muggers. However, he realises they are on to him, and tries to get the intel to Thames House. Before he can get there though, a man poisons him by injection, and dies as he arrives to meet Calum.
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