"Catacombs of the Moon" is the eleventh episode of the second series of Space: 1999 (and the thirty-fifth overall episode of the programme). The screenplay was written by Anthony Terpiloff; the director was Robert Lynn. The original title was "The Catacombs of the Moon". The final shooting script is dated 18 May 1976, with amendments dated 26 May, 9 June, 14 June and 17 June 1976. Live-action filming took place Monday 21 June 1976 until Tuesday 6 July 1976. Production was halted for two days (starting 2 July) when the fire effects used in the Osgood vision sequences got out of hand and the fire brigade had to be called in.