(written from a Production point of view)
Louise Sorel (born 6 August 1940; age 78), daughter of producer Albert J. Cohen and actress Jeanne Sorel, portrayed Rayna Kapec in the Star Trek: The Original Series third season episode "Requiem for Methuselah". She filmed her scenes between Monday 2 December 1968 and Tuesday 10 December 1968 at Desilu Stage 9, Stage 10 and Paramount Stage 5.
Sorel made her television acting debut in the 1963 episode of Route 66 entitled "Build Your Houses with Their Backs to the Sea", playing the wife of her future Star Trek co-star William Shatner. (Series-regular Glenn Corbett also appeared in that episode.) After "Requiem", she would go on to work with Shatner on an episode of Shatner's series Barbary Coast, the 1976 TV movie Perilous Voyage (which was actually filmed in 1968), and the 1982 film Airplane II: The Sequel.
However, she is best known for playing conniving characters on American daytime soap operas, most notably Santa Barbara (as Augusta Lockridge from 1984 through 1986, again from 1989 through 1991) and Days of Our Lives (as Vivian Alamain from 1992 through 2000 and again from 2009 - 2011), winning a number of Soap Opera Digest Awards for her work on the latter. Other soaps she worked on include One Life to Live and Port Charles.
Sorel also made guest appearances on a such shows as The Fugitive, Bonanza, I Spy, Medical Center, Ironside, Hawaii Five-O, Kojak, Quincy M.E., Charlie's Angels, Magnum, P.I., Diff'rent Strokes, and Law & Order. Sorel and Susan Oliver guest starred together in "The White Birch" episode of The Name of the Game. She and Jeff Corey co-starred together in "The Dead Man," which was the first story in the first episode of Night Gallery. She was also a regular on The Don Rickles Show in 1972 and Ladies' Man from 1980 through 1981 and had a recurring role on Knots Landing in 1982. Her film credits include 1971's Plaza Suite, the 1974 TV movie The Mark of Zorro (co-starring Frank Langella, Ricardo Montalban, and Jorge Cervera, Jr.), the 1982 made-for-TV movie Mazes and Monsters and 1984's Crimes of Passion (starring Bruce Davison) and Where the Boys Are '84 (with Wendy Schaal and Christopher McDonald).
Outside acting, she has been involved with Friends of the Sea Lions and Celebrity Action Council. She has studied French at the Institut de Francais in Ville Franche-Sur-Mer. She had her Days of Our Lives dressing room painted with a mural that depicted Paris in the summertime.