Doctor Elizabeth Dehner

Universe :	Prime Timeline
Name :	Doctor Elizabeth Dehner [1]
Species :	Humans

A psychologist, Dehner was on board the Enterprise during its mission to explore beyond the edge of the galaxy in 2265. She was conducting a study of crew reactions under extreme conditions. Born in Delman city, her father was Gerald Dehner. Elizabeth was 21 years old, 5 feet 2 inches tall, and weighed 116 pounds. She had an ESP rating of 088, an aperception quotient of 20/100 and Duke-Heidelburg Quotient of 258. Her EPS abilities were advanced for a human, manifesting themselves as superior performance in guessing games, reading cards, etc. Such abilities were present in both her maternal and paternal ancestry, in one case going back more than three generations. It is partly as a result of this that Dehner became interested in psychiatry - participation in tests and studies of other esper-oriented beings were the subject of her thesis at the College of Medical Science of the Tri-Planetary Academy and were the reason for her posting to the Aldebaraon colony. Contact with the energy barrier at the edge of the galaxy boosted her esper abilities massively, creating a geometric increase that threatened to give her almost unlimited power. However, shortly after these abilities began to manifest themselves Elizabeth was killed in a battle with Gary Mitchell, who had developed similar abilities. [2]

Colour key

Canon source

Backstage source

Novel source

DITL speculation

Associated with

Crew of the Enterprise 1701/1701-A

Played by

Series	Season	Actor	Film / Episode Title
TOS	1	Sally Kellerman	Where No Man Has Gone Before

References

#	Series	Season	Source	Comment
1	TOS	1	Where No Man Has Gone Before
2	TOS	1	Where No Man Has Gone Before	Much of the hard information is seen on the computer readout that Spock is studying

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Last updated : 17 Oct 2025

Series :	TOS Season 1
Episode :	Where No Man Has Gone Before

Series :	TOS Season 1
Episode :	Where No Man Has Gone Before
Comment :	Much of the hard information is seen on the computer readout that Spock is studying