Bass filmed his scene for "Space Seed" on Tuesday 20 December 1966 at Desilu Stage 9. He filmed his scenes for "Errand of Mercy" on Friday 27 January 1967 on location at the "Arab Village" part of the 40 Acres backlot. He filmed his scene for "Mirror, Mirror" on Wednesday 2 August 1967 , and his scene for "I, Mudd" on Monday 14 August 1967 , both at Stage 9.