A lieutenant who served at the helm of the USS Enterprise in 2267 and was left minding the ship at Starbase 11 when Spock commandeered it for Talos IV.
Lieutenant Hansen is a junior bridge officer seen in The Menagerie, Part I and in Court Martial, both set around Starbase 11. He should not be confused with the outpost commander of the same name in Balance of Terror.
In The Menagerie he has charge of the bridge while Kirk and McCoy are on the starbase. Spock comes aboard with what sound like genuine orders from the captain, tells Hansen that the helm will be run by computer on a secret course, and so takes the ship out of orbit with the injured Christopher Pike without the crew suspecting anything.
In Court Martial he is at the helm when the trial moves aboard and the ship is emptied so that Finney's heartbeat can be detected. He was played by Hagan Beggs.