David L. Ross was a recurring supporting actor on The Original Series, best known as the security officer Lieutenant Galloway, who was killed in The Omega Glory.
David L. Ross appeared in The Original Series in all three seasons, usually in a red shirt and often with a line or two. He is first seen as a security guard in Miri and soon became Galloway, a lieutenant who accompanies landing parties in A Taste of Armageddon and The City on the Edge of Forever.
Galloway is disintegrated by Captain Tracey in The Omega Glory, but Ross stayed with the series. He played Lieutenant Johnson, a crewman driven to bloodlust by the entity in Day of the Dove, and in Turnabout Intruder he is again addressed as Galloway.
He also appears as a guard in The Trouble with Tribbles and as a transporter officer in several other episodes.