Elizabeth Dehner

Doctor Elizabeth Dehner was a Starfleet psychiatrist who served aboard the USS Enterprise (NCC-1701) in the mid-2260s.

Biography
Elizabeth Dehner, the daughter of Gerald Dehner, was born in a city named Delman in 2236 on stardate 1089.5. In c.2253, 17-year-old Dehner decided to enter the Starfleet Medical Academy to study medicine and took a major in psychiatry, and eventually graduated in c.2261.

By 2264, Dehner had been promoted to lieutenant (j.g.) and was serving at the Federation colony on Aldebaran III. In early 2265, Dehner accepted a posting to the USS Enterprise, under the command of Captain James T. Kirk, for a long-term study of the affect of space duty on the human psyche, using the Enterprise crew as an example. (TOS novel: Strangers from the Sky).

However, a few months after Dehner's posting to the Enterprise, the ship was ordered to patrol beyond the Galactic Barrier to rescue a message buoy from the SS Valiant. While breaching the barrier, Dehner and 10 other officers were effected by a strange phenomena, but only Dehner and Lt. Commander Gary Mitchell survived. While Dehner seemed initially unaffected by the field, Mitchell began to exhibit god-like abilities, which was discovered to be linked to the ESP ratings of the crew, with Mitchell and Dehner having the highest ratings. With Mitchell becoming more powerful and placing the Enterprise at risk, Captain Kirk decided to abandon him on Delta Vega.

While on Delta Vega, Dehner began to exhibit the same powers and freed Mitchell so they could both rule the planet. However, Captain Kirk was able to appeal to her sense of duty, and Dehner attacked Mitchell and drained his powers so Kirk could kill him. In doing this, she sacrificed her life and died on Delta Vega. (TOS episode: "Where No Man Has Gone Before").