History and specifics
In the year 2153, the Denobulan Science Academy asked Charles Tucker II and Malcolm Reed to remove Yolen from caverns before they were all put before a Xantoras firing squad. (ENT episode: "The Breach")
In 2266, the mad Romulan Praetor ordered Keras's family to be executed following the loss of the ChR Gal Gath'thong near the Romulan Neutral Zone. His wife Arenn and son Gaius had been lined up for execution when the praetor changed his mind. (TOS - The Hollow Crown comic: "Issue 1")
Later that year, Romulans captured George Maguire and his pilots. A sergeant ordered them to be executed by firing squad, unaware that they'd escaped and disguised themselves as guards. (TOS comic: "Key Witness")
In 2374, while trapped in USS Voyager's holodeck during Hirogen simulations, Kathryn Janeway faced a Nazi firing squad. She was saved when a large group of Klingons appeared nearby and distracted the soldiers. (VOY episode: "The Killing Game")
USS Enterprise crew
In the 2260s during his five-year mission, James T. Kirk and his crew faced a firing squad many times. (TOS comics: "Creeping Death", "To Rule the Universe", "For Whom the Bell Tolls", TOS novella: The Prisoner of Vega)
In 2267, when McCoy was ordered to hand over the infant Leonard James Akaar to Maab as a row of soldiers held klugats at the ready, he noticed their resemblance to a firing squad. (TOS novelization: Friday's Child)
Kirk, Spock and members of a resistance movement on Morkol knocked out members of a Klingon firing squad and took their place in the execution yard of the Morkolian capital in order to rescue political prisoner Aarkan. (TOS comic: "Spheres of War")
Cultures that have used firing squads
- TOS episode & Star Trek 2 novelization: Errand of Mercy
- TOS novelization: Friday's Child
- TNG episode: "Birthright"
- VOY episode: "The Killing Game"
- VOY episode: "Spirit Folk"
- VOY episode: "The Q and the Grey"
- ENT episode: "The Breach"
- TOS novella: The Prisoner of Vega
- TOS novel: Home Is the Hunter
- TOS comic: "Revolt on Dak-Alpha"
- TOS comic: "Key Witness"
- TOS comic: "Creeping Death"
- TOS comic: "Spheres of War"
- TOS comic: "To Rule the Universe"
- TOS - The Modala Imperative comic: "For Whom the Bell Tolls"
- TOS - The Hollow Crown comic: "Issue 1"