(written from a Production point of view)
Sachi Parker (born 1 September 1956; age 59) is the actress who played Malcorian Doctor Tava in the Star Trek: The Next Generation fourth season episode "First Contact" in 1991. Parker filmed her scenes for "First Contact" between Friday 7 December 1990 and Tuesday 11 December 1990 on Paramount Stage 16.
Stephanie Sachiko MacLaine Parker was born in Los Angeles, California in 1956 as daughter of actress Shirley MacLaine and producer Steve Parker. She is the niece of actor and producer Warren Beatty who is married to actress Annette Bening. Parker was raised by her father in Japan since 1958, attended the Nishi Machi International School and the Gakushuin University in Tokyo and is fluent in Japanese.
In 1959 she was photographed with her mother for the cover and an eight site pictorial for the February edition of the magazine Life.  Author William P. Blatty, a friend of Shirley MacLaine, based the leading role Regan MacNeil in his 1971 novel "The Exorcist" on Parker and the part of Chris MacNeil on her mother. MacLaine was then forced to enroll her at a girls school in England. 
She also studied in Switzerland and worked in Hawaii and France. Parker was briefly engaged to a sheep-rancher in Australia and worked as a stewardess for Qantas Airlines. In 1981 she moved to her mothers house in Malibu. 
In 1993 she married investment banker Frank Murray. The couple has two children, son Frank Murray Jr. born in 1996 and daughter Arin. They divorced in 2011.
Parker made her acting debut in 1984, playing Dorothy Jenks in the Hotel episode "Tomorrows" which featured Trek actors Michael Spound, Adrienne Barbeau, and Terrence E. McNally. The same year she had a supporting role in the television drama His Mistress with Jake Dengel and Randal Patrick. She appeared in an episode of Scarecrow and Mrs. King (1985, with Gregory Itzin, Richard Lynch, and Patti Yasutake) before she was cast as Tracy Harris in the final season of the soap Capitol (1986-1987, with Constance Towers, Teri Hatcher, and Marj Dusay).
Following a recurring role as Lucy in four episodes of the daytime soap Santa Barbara in 1987 (with Michael Durrell and Scott Jaeck), Parker had guest parts in episodes of Faerie Tale Theatre (1987, with Peter Weller and Ian Abercrombie), Alien Nation (1989, with Gary Graham, Eric Pierpoint, Michele Scarabelli, Ron Fassler, Lori Petty, David Bowe, Wayne Pere, Noon Orsatti, and Bob Cummings), and Equal Justice (1990).
After she filmed her part for Star Trek: The Next Generation, Parker was also seen in the Eerie, Indiana episode "Reality Takes a Holiday" in 1992, with Francis Guinan, Jason Marsden, and Leland Orser).
In the early 1990s, Parker worked as anchor with Christopher Fields for Fuji TV's daily news program Manhattan Express, live from New York and aired in Japan. She introduced this in Entertainment Tonight, hosted by John Tesh.  She previously worked as host on the Japanese program The Entertainment Report and filmed a television commercial for Diet Pepsi with her mother. Parker was interviewed in several news programs including Good Morning America and ET. 
Parker made her film debut in 1985 in Burt Reynold's crime drama Stick which featured Trek performers Castulo Guerra and Dave Cadiente. She also had a role in the science fiction film Back to the Future in 1985 (with Christopher Lloyd, Ivy Bethune, and Jeff O'Haco). Further films include the drama About Last Night... (1986, with Rosana DeSoto, Ada Maris, and Dawn Arnemann), the comedy Peggy Sue Got Married (1986, with Catherine Hicks, Don Stark, and Cynthia Brian), the drama Riders to the Sea (1987), and the fantasy comedy Scrooged (1988, with Alfre Woodard, John Glover, Michael J. Pollard, Roy Brocksmith, and Leslie Cook).
She also appeared in the crime thriller Vietnam, Texas (1990, with Bert Remsen, Steven Vincent Leigh, Jeff Cadiente, and Jeff Imada), the thriller Bad Influence (1990, with Rosalyn Landor, John de Lancie, Lilyan Chauvin, and John Mahon), and the drama Welcome Home, Roxy Carmichael (1990, with Winona Ryder, Rhonda Aldrich, Heidi Swedberg, Angela Paton, and Terrence Evans) before she made her final appearance in the 1990s in the short comedy The Walter Ego (1991, with Bert Remsen, Geoffrey Blake, Willie Garson, and Daniel Riordan).
After a film break of twelve years, Parker appeared in a 2004 television commercial for Western Union. Her next role was in 2008 in the Japanese drama The Witch of the West is Dead . More recently she filmed the comedy All Me, All the Time (2009) and the Japanese drama Toiretto (2010).
Parker performed the play "The Glass Menagerie" in the role of Laura and appeared as Nina in "The Seagull" at the Theatre Artists Workshop where she frequently performs. Other plays include "Moon Children" at the Edinburgh Festival, "Independence" at The Gnu Theatre (1991) , "Abraham Lincoln" at The Mark Taper Forum, and as mother in Edward Albee's "Three Tall Women". More recently in 2011 she performed the one woman show "Lucky Me". This play is autobiographically and co-written by Parker.