Doctor Who: 10 Celebrity Cameos From The Revived Series

3. Peggy Mitchell (Army Of Ghosts)

OK, so Peggy Mitchell isn't a real person but she's still a celebrity in her own right. Back to the Series 2 finale now and those aforementioned ghosts were even wreaking havoc in the fictional land of Albert Square. One of them had taken on the personna of Dirty Den, one of the soap opera's most notorious villains, who got shot and fell into a canal but somehow managed to survive and return to the series years later. That's certainly one way to cheat death - perhaps he'd been taking tips from Rory Williams? This short but sweet scene was a chuckle-worthy little tidbit poking fun at Den's inability to remain dead as the Queen Vic's formidable landlady ordered his ghostly guise to "get out of her pub". It would've no doubt been appreciated by fans of EastEnders (though not the members of the audience who weren't and those who still hadn't recovered from Doctor Who's charity crossover with EastEnders in 1993) but here's something else to make you really scratch your heads. If EastEnders exists in the Doctor Who universe and Tracy Ann Oberman - who appeared in this episode as Torchwood's administrator Yvonne Hartman - was in EastEnders, how on Earth can she exist in both? There's no doubt a reasonable canonical explanation to be found somewhere or the entire foundations of the Doctor Who mythology have been based on a never ending spiral of lies and corruption. Either/or.