Mary-Linda Rapelye
Mary Linda Rapelye  was the actress who played the role of Irina Galliulin in the  third season episode . She filmed her scenes between Friday  and Friday  at Desilu Stage 9 and Stage 10. She was also called in for a music recording session on Wednesday , and a makeup and costume test on Thursday  at Stage 9.

Rapelye received a BA in theater arts from the University of Kansas. After returning from a theatrical tour in Europe, she was cast in the role of Susan Kidwell in the 1969 film adaptation of '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 's character in the science fiction film Marooned, which also featured Nancy Kovack, Mariette Hartley, and Bill Couch, Sr..

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 ten-year absence, from television Rapelye returned to television in 1980 with a role in the CBS mini-series Blind Ambition. Among her co-stars in this program were fellow Star Trek alumnae Ralph Byers, K Callan, 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, from 1979 to 1980 working with Anthony Call. After just only one year, she left to star on another soap opera, As the World Turns, where she spent five years playing attorney Margaret "Maggie" Crawford Andropolous from November 1980 until September 1985, having been expelled and written out of the series. Among her co-stars on this series were Michael Forest and Kathryn Hays. Afterward, she once again left television behind and decided not to act for a time. 

In 2006, she then 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.

Rapelye ran her own business, White Cottage Bed & Breakfast, in Boothbay Harbor, Maine. In addition, she occasionally taught acting classes in the same town. 

She passed away on  after a fight with cancer.

External links 
  – official site
  – business site
 
 

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Performers
TOS performers