(written from a Production point of view)
Mary Katherine Peters, today known as Mary Peters-Scannell, is a former stuntwoman and stunt actress who performed stunts in Star Trek II: The Wrath of Khan and in several episodes of Star Trek: The Next Generation and Star Trek: Deep Space Nine. Peters filmed her stunt scenes for the episode "The Outcast" along with fellow stuntwoman Janet Lee Orcutt under stunt coordinaton of Dennis Madalone on Tuesday 14 January 1992 on Paramount Stage 16. Her costume from this episode was later sold on the internet. 
She has doubled for stars such as Sigourney Weaver, Delia Sheppard, Joan Cusack, Mary Gross, Tina Louise, Brigitte Nielsen, Vanessa & Lynn Redgrave, and Lindsay Wagner.
Among her stunt resume are films such as Carrie (1976, with stunts by Dick Ziker and Janet Brady), The Lady in Red (1979, with Louise Fletcher, Christopher Lloyd, Dick Miller, Nancy Parsons, Michael Cavanaugh, and stunts by Vince Deadrick and Harry Wowchuk), Airplane! (1980, with Jonathan Banks, Marcy Goldman, Gregory Itzin, Cyril O'Reilly, Kenneth Tobey, Jason Wingreen, and stunts by Leslie Hoffman, Janet Brady, and Gene LeBell), The Sword and the Sorcerer (1982, with Richard Lynch, Anthony De Longis, Joseph Ruskin, and Jeff Corey), Lethal Weapon (1987), Beetle Juice (1988), Ghostbusters II (1989, with Aaron Lustig, Page Leong, George Wilbur, Christopher Neame, and stunts by Jophery C. Brown, Tony Brubaker, Erik Cord, Vince Deadrick, Donna Garrett, Joel Kramer, Bob Minor, Kim Washington, and Andy Gill), Bride of Re-Animator (1990, with Jeffrey Combs), Terminator II (1991), The Addams Family (1991, with Christopher Lloyd and Carel Struycken), Batman Returns (1992), Dolly Dearest (1992, starring Denise Crosby and Chris Demetral), Naked Gun 33 1/3: The Final Insult (1994), Copycat (1995), Independence Day (1996, with Brent Spiner), Alien: Resurrection (1997, with Brad Dourif and Ron Perlman), Playing God (1997), Mimic (1997), and Hansel & Gretel (2002, with Daniel Roebuck).
Peters has also performed stunts in television series such as M*A*S*H (1974-1975), The Fall Guy, Knight Rider, Charlie's Angels, CHiPs, Silk Stalkings, VR5, Alien Nation, L.A. Law, Baywatch, Buffy the Vampire Slayer, and Baywatch Nights (1996, with Anthony Guidera).