Leslie Dalton (born 12 August 1944) is an actress from Boston, Massachusetts, who played Drea from the Kelvan Empire in the Star Trek: The Original Series episode “By Any Other Name”, credited as Lezlie Dalton. Drea was a Kelvan female and a member of an expedition from the Kelvan Empire in the radiation-imperiled Andromeda Galaxy. Her ancestors were part of a wave of multi-generational starships dispatched to nearby galaxies to find new territories for the Empire to conquer and occupy. Reaching the Milky Way Galaxy after centuries in the intergalactic void, her ship was destroyed crossing the galactic barrier. Under Rojan’s command, Drea escaped with three other crewmembers in a life-craft to a Class M planet. The Kelvans adopted humanoid forms more compatible with the new region’s intelligent life and available transportation.
After a false distress call attracted the attention of Captain James T. Kirk, Drea was part of the boarding party that captured the USS Enterprise. Drea served as the Enterprise flight officer for the return home to report their discoveries to the Kelvan Empire. Humanoid sense perceptions and emotional tendencies were alien to Kelvan experience, allowing Kirk and his senior officers to exploit Kelvan weaknesses. Drea was the only Kelvan not subjected to this attempted subversion. Eventually, Kirk suggested that the Kelvans’ new Humanity could be fully realized on a planet in the Milky Way, and the Kelvans restored control of the Enterprise to Kirk and his crew.
Dalton went on to become a featured player on Dean Martin’s 1970s variety show The Golddiggers. Afterward, she made guest appearances on the Henry Darrow/Anthony Zerbe television series Harry O and two episodes of S.W.A.T. in 1975 and 1976. The following year, she became a regular on the soap opera The Guiding Light, where she stayed until 1981.