 Dark appeared in 1959 as Juan Carlos Morita in the episode "Death of a Gunfighter" on CBS' "Have Gun Will Travel" and as Trevor Jackson in the episode "Reunion" of CBS's "The Texan", starring Rory Calhoun; his fellow co-stars were Bethel Leslie and Robert F. Simon.That same year, he was cast as Henri Gaspard in "Double Fee" of Steve McQueen's CBS western series, "".https