Episode opens with The Grid Ros & the team are desperately trying to locate Harry, trying to get a response. They obviously fail at first.

They eventually figure out that the FSB have captured him. They guess he has been taken to Moscow & send Lucas over there.

Meanwhile Malcolm is up to something, the audience won't know until the end. But we hear snippets of phone calls about someone returning, and a meeting which will take place at a later stage.

Lucas expends all his contacts in Moscow and comes up with a possible lead in St Petersburg. Ros & Jo travel around London interrogating all Russian diplomats about potential intelligence on Harry.

The last scene shows Malcolm walking along the Thames, walking up behind a figure (clearly female) and stopping just short of her. He says "Hello" sheepishly and the figure turns... it is clearly Ruth.. she smiles and at THAT moment the screen goes to that negative black & white thing and we see next weeks preview.

I particularly love the thought of Ros 'interrogating' Russian diplomats"

scenes of Harry being tortured by the Russians interspersed throughout the episode.

what if those in higher places try and make Harry's disappearance look like he has defected and gone over to the Russians. He was the double agent all along? No one is allowed to go and rescue him in the Grid so they have to bring in someone from the outside ?? Ruth must be missing her cats by now?

At the end of series 7 Malcolm shakes hands with Harry just before he goes to meet the FSB guy Victor, did Malcolm use the nano technology in a ring, liked they used to trace Mohammed Khorad (?). They could then track Harry using microwave bursts.