The song that Jeff sings in the mirror was invented for Vic Reeves and Bob Mortimer previous show, 'Bang Bang: It's Reeves and Mortimer'.
Apart from the two main characters played by Vic Reeves and Bob Mortimer, of the 11 credited Supporting Cast members, 8 have appeared on Doctor Who: Tom Baker, Hywel Bennett, John Thomson, Nicola McAuliffe, Mona Hammond, David Walliams, Janet Henfrey, and Lizzie Hopley.
In addition to the eight actors that are Doctor Who alumni, the screenplay for this episode was written by Gareth Roberts who is a frequent writer and contributor of Doctor Who scripts, is in many Doctor Who comedy skits, and is seen often in Doctor Who Confidential spots.