Doctor Strange (film)

Bill Potts said to the Twelfth Doctor he should watch Doctor Strange, right after she used the term "astral projection".

Both Bill and Masie Holland thought it was good. (PROSE: The Shining Man)

Upon escaping the Dreamspace, Bill noted she had an astral form, like on Doctor Strange. (COMIC: The Soul Garden)

Behind the scenes
Doctor Strange was a film based on the character of the same name released by Marvel Studios in 2016. Benedict Cumberbatch plays the titular hero.

However, no story has made a connection between the character and the movie. In fact, neither The Shining Man nor The Soul Garden explicitly confirm that Doctor Strange is a film.