TK-104 was a Human Imperial stormtrooper during the Galactic Civil War. TK-104 was stationed on the planet Bespin during its occupation by Imperial forces led by the Sith Lord Darth Vader in the year 3 ABY. Darth Vader planned to capture the freighter Millennium Falcon, which carried the Rebel Alliance fugitives Princess Leia Organa and Han Solo, who were used as bait for his true target: his Jedi son Luke Skywalker. TK-104 was present on Bespin's Cloud City when the fugitive Rebel ship arrived on the planet. The trooper was loyal, and like many other stormtroopers, tried to stand out in service to Darth Vader in the hope of receiving the Sith Lord's notice and favor.