[spoilers] Lucas. Just Lucas.

[theeyeshaveit]

Even though they have thrown out hints and questions about Lucas' loyalty I have felt he has squashed each hint with loyalty, bravery and everything else required. I have never had a further question about him since the episode where he went back to Russia to help clear Harry who was being accused of treason.

What more loyalty (and I felt some sort of affection for Harry) could Lucas show than to have the courage to go back to Russia to save Harry when there was a good chance he could be picked up and end up back in a Russian prison again. It would have been a terrifying experience and you could see how nervous Lucas was in the taxi ride from the airport. Lucas took the biggest risk of anyone to save Harry and that was not the action of a traitor.