Series 9 Rumours & Speculation

[KiKi]

I haven't seen this posted elsewhere, apologies if it has been. But the Radio Times for next week says:

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So Lucas North has turned bad: "He's a skilled, resourceful and dangerous operative...and a threat to national security" a beetle-browed Harry Pearce tells his sombre and and ferarful colleagues on The Grid. How did it come to this? We've learnt during the past few weeks that Lucas isn't the man we thought he was, though his motivation for going rogue isn't immediately clear. He surely can't have done it for the love of a good woman, can he? Lucas is right at the heart of a typically fretful and exhausting series finale packed with bluff, double bluff and betrayal. Spooks enjoys messing with our minds. More importantly, it knows how to deliver a shocking climax. And it does.

Also:

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With the team still in shock about Lucas North, a specialist is brought in to help the find the man they knew as their section chief and friend. But as the search grows desperate, Harry and Lucas embark on a deadly game of cat and mouse.

One last one from a picture caption in RT:

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What role has Maya Lahan played in Lucas North's change of direction?

Which potentially suggests

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that all is not lost, and that there is more to the ridiculously unbelievable Lucas/Maya relationship than meets the eye...