American actor who played Morgan Earp in the original series episode Spectre of the Gun and, two decades later, J'onn, Sybok's first convert, in Star Trek V: The Final Frontier.
Rex Holman, an American character actor, was, a familiar face in television Westerns of the 1960s such as Gunsmoke.
He first appeared in Star Trek in the third-season original series episode Spectre of the Gun (1968), playing Morgan Earp, one of the Earp brothers whom the Melkotians' illusion sets against Kirk and his officers at the O.K. Corral.
In Star Trek V: The Final Frontier (1989) he played J'onn, a ragged settler scratching a living from the desert of Nimbus III. In the opening scene Sybok rides out of the dust, takes away J'onn's pain and wins him as the first of his followers. J'onn later helps seize Paradise City and travels aboard the Enterprise.