10 Doctor Who Cameos You Definitely Missed

10. Sandy McDonald (The Unicorn And The Wasp)

Appropriately enough, our first cameo comes from an episode all about looking for clues – though hopefully you won’t need a magnifying glass to spot him!

Look closely when the Tenth Doctor and Donna are enjoying cocktails on the lawn in The Unicorn and the Wasp, and you might just spot a footman bearing a passing resemblance to the Tenth (and now Fourteenth!) incarnation of everyone’s favourite Time Lord. That’s because he was played by David Tennant’s late father, Sandy McDonald.

"I was coming down to visit David", McDonald explained to Doctor Who Confidential. "I think they must have been short of someone, because they very kindly invited me to play the part of a footman!"

Having your dad feature in Doctor Who is a claim to fame no other Doctor can make. Consider too that Tennant’s future wife (Georgia Moffett) and father-in-law (Peter Davison) had previously appeared alongside the Tenth Doctor by this point, and the Tennant clan pretty much owns Doctor Who by this point.