Doctor Who's greatest crossover videos - from Harry Potter and Buffy to Sherlock and Star Wars
Ever wanted to see the Tenth Doctor save the Quiddich World Cup? Or see the Eleventh Doctor team up with Jean Luc Picard to fight the Cybermen? Here are some of the best Doctor Who mash-ups...
Buffy the Dalek Slayer
Of course, Doctor Who has some of the most iconic opening titles of TV history. But then we saw the Buffy the Vampire Slayer remixed version and it put everything into perspective. Put together by Youtube user Punkocarp, we can now finally know what it would've been like if Joss Whedon had crossed over into a parallel universe and had a hand at a slightly different sci-fi series instead. The results? We've no idea, we just love that theme tune.
The One Where Ross is Exterminated
From a bunch of New York 20-somethings drinking endless cups of coffee to a bunch of aliens flying through space and time to vanquish evil – why didn't we see it before? The US sitcom Friends and Doctor Who are basically the same show – as Youtube user cool70sfreak clearly demonstrates with his reworking of the opening titles.
