Split Loyalties

Season 7, Episode 2:

As the team reels from Adam's death, Harry vows to take revenge on the man he believes to be responsible -- FSB chief, Arkady Kachimov. Harry seeks the support of the British Government, explaining that he believes the Russians are engaged in a campaign to destroy Britain. The Government refuses to acknowledge his plea and insists it will not sanction his desire for revenge. Harry must find concrete proof that the Russians are behind it all.