I'm really enjoying Undercover - I've seen the first three episodes and just read lengthy synopses of them - but still confused. Do we know why the dodgy police have got a hold on Nick? What dodginess has Nick been upto? I suppose all will be revealed in the last episode - or it won't be to prepare for a second series.
He was one of them wasn't he Rosie. He went undercover, fell in love with his now wife, and the police have a hold over him because his wife knows nothing of his life as a policeman in the team that killed Michael.