(written from a Production point of view)
Rapelye received a BA in theatre arts from the University of Kansas. After returning from a theatrical tour in Europe, Rapelye was cast in the role of Susan Kidwell in the 1968 film adaptation of Truman Capote's novel, In Cold Blood. Also appearing in this film were Jeff Corey, John McLiam and Nick Dimitri. Two years later, Rapelye appeared as the daughter of Gregory Peck's character in the science fiction film Marooned, which also featured Nancy Kovack, Mariette Hartley, and William Couch.
Besides Star Trek, Rapelye guest-starred in a 1969 episode of NBC's Ironside with fellow TOS guest star Alfred Ryder. From 1969 through 1970, she was a regular on the soap opera Medical Center, co-starring James Daly and Barbara Baldavin.
Following a seven-year absence, Rapelye returned to television in 1979 with a role in the CBS mini-series Blind Ambition. Among her co-stars in this program were fellow Star Trek alumni Ralph Byers, K Callan, Howard Culver, James Greene, Graham Jarvis, Alan Oppenheimer, Lawrence Pressman, Logan Ramsey, Peter Mark Richman, William Schallert, James Sloyan, and William Windom.
Soon afterward, she won the role of Faith Kipling on the long-running soap opera One Life to Live, working with Anthony Call. After just one year, she left to star on another soap opera, As the World Turns, where she spent five years (November 1980-August 1985) playing lawyer & attorney Maggie 'Margaret' Crawford Andropolous from November 1980 until she left the show in August 1985 due to getting kicked out of the show and written out of the series. Among her co-stars on this series were Michael Forest and Kathryn Hays. Afterward, she again left television behind.
In 2005, she returned to the world of Star Trek, playing Ambassador Rayna Morgan in the fan production Star Trek: New Voyages. She starred in the episode "To Serve All My Days", alongside her "The Way to Eden" co-star Walter Koenig and Trek performers John Carrigan, James Cawley, Jeffery Quinn, and Larry Nemecek. D.C. Fontana, Ethan H. Calk, and Jack Treviño wrote this episode.
Mary Linda Rapelye currently runs her own business, White Cottage Bed & Breakfast, in Boothbay Harbor, Maine. In addition, she occasionally teaches acting classes in the same town.