In 1989 the Doctor and Ace walked off into the sunset, never to return - the series quietly cancelled. But what if the series had been given one last chance...
This question was posed on Doctor Who fan site, Gallifreybase.com, and my answer was for the serial to change from 14 x 25 minute episodes per year, to several movie length episodes per year.
The first movie would feature the Daleks chasing the Doctor and Ace across the universe of Time and Space, until there was no where left to hide (Yes, a little like the classic 1960's story, The Chase). It would be the pair's final adventure together in the TARDIS, with Ace being killed, and the Doctor regenerating into a new Doctor.
This video was created with that first movie in mind, as a little opening sequence to remind the audience of the Doctor's ongoing battles with the Daleks, and also his changing face over the years.