This 12 Again: Doctor Who Special travels through space and time to celebrate 50 years of Doctor Who.

Super fans join cast members past and present to share their memories of watching TV’s top Time Lord when they were young. Who was their Doctor when they were a kid? Which aliens had them hiding behind the sofa?

Featuring CBBC’s super fan Chris Johnson, impressionist Jon Culshaw, Tommy Knight (Luke Smith), Warwick Davis (Porridge), Neve McIntosh (Madame Vastra), Dan Starkey (Strax) Louise Jameson (Leela) and the Seventh Doctor, Sylvester McCoy.

We’ll find out about the Doctor himself, the TARDIS and the famous theme tune as we travel back to a different dimension with our celebrities as they become 12 Again.