An Enterprise officer of lieutenant commander rank who serves on several landing parties in the first season, including the search of Taurus II and the fight against the Gorn on Cestus III.
Lieutenant Commander Kelowitz is a member of the Enterprise crew played by Grant Woods in three first-season Original Series episodes: The Galileo Seven, Arena and This Side of Paradise.
In The Galileo Seven he leads one of the landing parties searching Taurus II for the missing shuttlecraft and reports back to Kirk that the planet's huge inhabitants have killed one of his men and injured others.
In Arena he beams down to the ruined outpost on Cestus III and, while under bombardment, scouts the enemy position so that Kirk can reply with a grenade launcher. He appears once more in This Side of Paradise as part of the landing party sent to the colony on Omicron Ceti III.