Liste der Folgen

Detectives are summoned to a hospital to interview an ex-Russian spy who claims to have been poisoned

Watched by the world, the Metropolitan Police follow the radioactive trail of polonium across London, leading them to their main suspects, Lugovoy and Kovtun.

Part of the investigative team travel to Moscow, to do interviews with Russia's "help".

After waiting eight years, the Prime Minister orders a public inquiry.