His first role in Star Trek was as the holographic Nazi SS captain in VOY: "The Killing Game" and "The Killing Game, Part II" . He later returned to Voyager to play One, a 29th century Borg drone in the episode "Drone" . On Deep Space Nine, he played Vornar, a Cardassian, in "Tacking Into the Wind" . On Enterprise he played a Vulcan, Mestral, in "Carbon Creek" . He also played another Nazi SS officer in "Zero Hour" and "Storm Front" .