Rex Holman
Rex Holman  is an actor who appeared twice in Star Trek, the first time as Morgan Earp in the  third season episode . His appearance in  as J'onn is his last known on-screen appearance. Holman was born as Roy Eugene Baker in Tulsa, Oklahoma and lived most of his life in Southern California.

Holman was originally cast as Virgil Earp in "Spectre of the Gun", however, the original actor playing Morgan Earp was fired after the first shooting day due to his drug problems, and Holman was recast in his role, while Charles Maxwell was hired to play Virgil. (These Are the Voyages: TOS Season Three, pp. 72-73) Holman filmed his scenes between Tuesday  and Monday  at Desilu Stage 10.

In 1970, Holman recorded an album on the Pentagram label called Here in the Land of Victory. It featured a mix of country, blues, and eastern influenced folk.

In 1976, he appeared on the TV series The Land of the Lost. He was the ship's captain, Reuben Van Demeer, in the episode "Flying Dutchman".

Star Trek appearances
  as Morgan Earp
  as J'onn

Star Trek interview
"Space Cowboy", Bill Warren, , issue 152, March 1990, pp. 60-63

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Performers
Film performers
TOS performers