The last episode of the current series is to have a prequel, it was announced this afternoon.
Entitled She Said, He Said, it has been written by showrunner Steven Moffat and will feature Jenna-Louise Coleman as Clara and Matt Smith as the Doctor.
According to the show's official website, it will be one of the longest prequels the show has had and will look at "how little Clara knows about the Doctor . . . and vice versa."
The minisode will be made available from the official website and via the BBC's Red Button service straight after Nightmare in Silver ends in the UK this coming Saturday at 7.45pm. Series finale The Name of the Doctor airs in the UK on Saturday 18th May, with the time still to be confirmed.