Clarence and the Whispermen is a short produced exclusively for the Doctor Who: Series 7 Part 2 and Doctor Who: The Complete Seventh Series DVD and Blu-ray box sets. It was written by Steven Moffat and serves as a prequel to the events of The Name of the Doctor.
Synopsis: The Whisper Men approach Clarence DeMarco while in jail, producing the coordinates to Trenzalore which he must give to the 'reptile detective' so they would end up with the Doctor.