Cottingley fairy photos

Taken in 1917, the Cottingley fairy photos showed frolicking fairies. The creators sounded so convincing that, despite all the experts declaring the pictures fake, many people believed them. When the girls were around ninety, they admitted that the fairies weren't real after all: they were actually just painted cardboard. (PROSE: Iceberg)

Gwen Cooper did a school project on the photos as a child. No less than Sir Arthur Conan Doyle believed they were real, as well as Harry Houdini. One of the photos showed Jasmine Pierce, a formerly human Chosen One from 2007, now changed into a fairy herself. (TV: Small Worlds)

Behind the scenes
In reality, Sir Arthur Conan Doyle did believe in the authenticity of the photos, having accepted the existence of the supernatural by that time in his life.

One of the fairies in the photo shown in extreme close-up in Small Worlds and on the Torchwood website was retouched to make it appear to have Jasmine's face.

Soon after playing the Eighth Doctor in Doctor Who, Paul McGann starred in the 1997 film, another fictionalised account of the photos which portrayed them as genuine.