http://comicbook.com/startrek/2018/07/13/star-trek-roger-perry-passes-away/

‘Star Trek’ Star Roger Perry Passes Away

2018/07/13

Star Trek star Roger Perry has passed away at the age of 85.

Star Trek fans will know Perry from the 1967 episode Tomorrow Is Yesterday, where he played the role of Captain John Christopher.
The 19th episode of the original season, the story revolved around the USS Enterprise being thrown back in time tot he 1960s, resulting in the government thinking it is a UFO.
Perry’s John Christopher is the pilot of the F-104 interceptor sent to investigate, and he is transported onto the ship.
Kirk, Spock, and the rest of the crew have to figure out how to get him back to Earth without messing with the timeline, which the [sic] eventually do.