"The Mark of Archanon" is the eighth episode of the second series of Space: 1999 (and the thirty-second episode overall of the programme). The screenplay was written by Lew Schwarz; the director was Charles Crichton. The final shooting script is dated 12 April 1976, with amendments dated 21 April, 26 April, 27 April and 28 April 1976. Live action filming took place Tuesday 4 May 1976 through Tuesday 18 May 1976.