11 Times Doctor Who Stupidly Spoiled Its Own Secrets

5. Rose Tyler Making A Surprise Return In Series 4... Ruined When Billie Piper Was Pictured On Set

The Secret: Rose Tyler broke the heart of the nation at the end of Series 2 when she parted ways with the Tenth Doctor on the shores of Bad Wolf Bay. It was highly publicised as their "final farewell" and, to all intents and purposes, it really looked like it was. "Anything can happen in sci-fi" of course (which Billie kept harping on about like a broken record as soon as she left) and, rather unexpectedly, everybody's favourite shop girl turned Earth Defender was back with an almighty vengeance a grand total of one series later. How It Was Spoiled: Well, Billie being pictured on set by a fan was a bit of a giveaway. After all, it makes complete sense to secretly bring back one of the show's most popular actresses and then make her film in the middle of a crowded Cardiff street. The preceding Internet stir forced the BBC to "announce" her return by revealing that she'd be appearing in an undisclosed number of episodes, for an undisclosed amount of time and for reasons that would remain... erm, undisclosed. At least they took the time to tell us she was back. Because none of us knew that already.