Time Crash may be only 15 minutes long but in that 15 minutes it establishes itself as one of the show's very best TV stories (even if it can't be called an episode as such).

Peter Davison and David Tennant bounce off each other brilliantly, with the banter between them consistently being snappy and funny to watch. It's always interesting to see how different incarnations of the Doctor interact with each other and 10's fanboyish enthusiasm for the 5th Doctor is refreshing among the multi-Doctor tendency to not have the incarnations get along.

Time Crash does everything right that Dimensions In Time got wrong. It offers a strong, simplistic narrative and plenty of screen time for the incarnations of the Doctor involved.