If you haven’t watched An Adventure in Time and Space yet, you should. It’s a docudrama about how Doctor Who first started and the people who helped it along the way. The main focus of the movie is the First Doctor, William Hartnell. Due to his failing health, he had to leave the show, prompting the idea for regeneration. In the film at the end, he is filming his last scene. Matt Smith makes a cameo to signify how to torch would be passed for years and years to come.
Recently, I came across an interesting fact. In the last episode Hartnell is in (The Tenth Planet) a mysterious force over takes the TARDIS flipping switches and pressing buttons, just like Matt Smith is doing above.
I love how Doctor Who (almost) always come in full circle.