The Best Episodes Written By John Henry Butterworth

Promised total transformation, nine very different people arrive at Tranquillum House, a secluded retreat run by the mysterious wellness guru Masha.

Henry and Martian run diplomatic interference. Danny walks a tightrope.

Martian finds a needle in a haystack and confronts Sami about London.

Henry sends Owen to Minsk in a hunt for clues. Martian sets a rat trap.

Martian's approach doesn't go to plan. Sami makes a startling confession.

A spooked source threatens to put an operation at risk.

As the guests learn more about Tranquillum's unique protocols, everyone must decide if they will continue under Masha's care. Meanwhile, Masha is receiving mysterious threats of her own.

Martian buys time with a bluff to Langley. Danny crosses the Rubicon.

As healing begins, the guests begin to doubt the retreat's unconventional methods. They came for massages and relaxation, not to face their own mortality.

Martian scrambles to unravel Cossack's game. Osman plays his hand.

Covert CIA agent Martian is called back to London Station.

Bosko shares a grim truth. Martian makes a devil's bargain.

Bosko is briefed on Valhalla. Martian, Henry and Naomi strategize a play.