Friendship at risk.
The BAFTA-winning, international hit spy show returns for a ninth series with a host of new characters that shake things up as Section D, once again, are left wondering who can really be trusted.
One month after Ros's funeral, the team are tracking suspected terrorist, Abib, on a boat from Tangiers. Meanwhile the usually calm, confident Harry is caught in a difficult position when he is to work closely with the Russians. Relations between the CIA and MI5 reach breaking point over mysterious hackers. And a horrific truth about Lucas's past is uncovered by Harry when they come face to face in a compelling interrogation. Friendships are tested to the limit, Harry and Ruth's bond intensifies and the depth of deceit leads to the ultimate game of cat and mouse.