Do you think Peggatty's laughter is Tom Karol? I always think it sounds a lot like Mrs Grimwold.

This is something I've wondered about too, and asked for Billy's opinion on via Beg Billy on the Interactive Knightmare website many years ago.

I certainly think Peggatty's laughter was done by a man. If it was Tom Karol, I wonder if they'd had it on tape for three years, unused, or if it was newly recorded as an uncredited contribution.

I'm not keen on the idea of Tom Karol being called back in just to record a little bit of audio, then sent on his way (even though we know that Tim Child did keep Tom in mind post-Series 3 and worked with him again on the TimeGate pilot in 2002). I do like the idea of Tim deciding to recycle Mrs. Grimwold's laugh for Peggatty, reminiscing about the Grimwolds and that being why Tim included references to the Grimwolds (including a son) in Series 6.