Doctor Who: Time Crash
by Steven Moffat; dir. Graeme Harper (BBC, 2007)
An 8-minute charity special that should very much be considered canonical. Moffat’s mini-script is first-rate, pairing the Fifth and Tenth Doctors in a humorous yet sentimental melding of eras (thus also director Graeme Harper). David Tennant and Peter Davison work brilliantly together.