RA:The only character you couldn’t kill is Harry, you kill Harry and you kill the show.

PF:I suppose someone has to stay to give the show a grounding. Younger actors do a couple of series and then say, 'I want to go and do more interesting work.' I’m happy to have a steady gig and it’s great to be in something this good, popular and relevant.

Doesn’t Lucas have a love interest this season?

RA: He does and it’s quite a dangerous one, a CIA liaison officer who is very beautiful, tall and blonde. It starts off as a power-based sexual relationship and turns into a deep love affair, but they start to double cross each other. Unfortunately Harry and Ros are monitoring him so it’s a bit of a sorry relationship because it can never truly flourish away from work.