Davis filmed his scenes for "Balance of Terror" on Wednesday 27 July 1966 and Thursday 28 July 1966 at Desilu Stage 9. He filmed his scenes for "Errand of Mercy" on Friday 27 January 1967 at the "Arab Village" section of the 40 Acres backlot. This article is a stub relating to real-world information such as a performer, author, novel, magazine, or other production material. You can help Memory Alpha by fixing it.