In 1974, Jon Pertwee and Elisabeth Sladen reprised their roles of the Third Doctor and Sarah Jane Smith respectively for a ten-minute mini-episode, which also included an appearance by the Daleks. The episode was created in conjunction with an appearance at the Goodwood Racecourse in West Sussex and was apparently to have been played at the venue itself. The untitled mini-episode was never broadcast. It remained hidden in the BBC Archives until 2005, when it was included on Doctor Who at the BBC Volume 3, an edition of the Doctor Who at the BBC series of CD releases (also narrated by Sladen).