(written from a Production point of view)
Stephen D. Mines (born 3 February 1939; age 79) is the actor who played the unfortunate Lieutenant Robert Tomlinson in the original series episode "Balance of Terror". He filmed his scenes on Monday 25 July 1966 at Desilu Stage 9.
Mines was a regular cast member on the daytime soap opera As the World Turns from 1966 through 1968. A brief role on Dan August in 1971 is his last known guest appearance on any TV series.