S1·E22 The Duplicated Man

LOCATION: Foreign Office, London DATE: February 16th.

A plane carrying a British MI5 agent explodes over the English Channel. Witnesses on a boat crossing the Channel see the plane explode and are certain no one survived. Sir Curtis, however, is confident the agent jumped from the plane prior to the explosion, and sends the Department out to find the agent. The Department’s activity catches the interest of Russian agents, who are also certain the agent “who was also working for the Russians” is still alive.