nromanova:

Graham: And, is this the first time you’ve worked together since Doctor Who?
David: Uh, well, in acting it is, isn’t it?
Catherine: Yeah.
David: We’ve done a lot of other…
Graham: Building? What else did you do?
Catherine: Are you referring to my show as “not acting”? You were on my Christmas special.
David: Yeah, but that was…
Catherine: Rude, rude!
Graham: I think it’s quite rude.
David: That wasn’t acting, I just did a silly voice with some tight trousers.

Source: nromanova