The Fifth Doctor, Peter Davison, appeared in a special Children In Need episode alongside David Tennant, The Tenth Doctor.

This episode, Time Crash, was broadcast on 16th November 2007, and was watched by over 10 million viewers.

Until Voyage Of The Damned, which aired on Christmas Day, this mini-episode was the most watched of the show, since its 2005 revival.

Georgia Moffett, Peter Davison's actress daughter, played The Doctor's Daughter in the Series Four episode of the same name.