(written from a Production point of view)
Agnes G. Henry is a former costume designer and costumer worked in the wardrobe department on the first three Star Trek films. She and James Linn were wardrobe supervisors on Star Trek II: The Wrath of Khan and Star Trek III: The Search for Spock, with Henry handling women's wardrobe and Linn the men's wardrobe.
Henry was active in film and television during the 1970s and 1980s. She designed costumes for the 1970 film Norwood (starring Kim Darby and David Huddleston) and for the made-for-TV movies Killer by Night (starring Theodore Bikel, Robert Lansing, and Jason Wingreen), Katherine (starring Jane Wyatt), and Big Bob Johnson and His Fantastic Speed Circus (starring Charles Napier in the title role).
In addition, Henry was costume designer on the TV movies This Year's Blonde (starring Michael Strong and Vic Tayback) and The Silent Lovers (starring Brian Keith) and women's wardrobe supervisor on the TV movie The Scarlett O'Hara War (featuring Don Keefer, Warren Munson and Clive Revill). These three movies, all of which aired on NBC in May 1980, were directed by John Erman and featured cinematography by Star Trek II's Director of Photography, Gayne Rescher.
Henry was also a costumer on two films featuring James Cromwell: 1976's Murder by Death (featuring set decoration by Marvin March) and 1978's The Cheap Detective (co-starring Louise Fletcher, David Ogden Stiers, Vic Tayback, and Paul Williams, with cinematography by John A. Alonzo). Her other credits as a costumer include the films The Klansman (starring David Huddleston and Vic Perrin), Chu Chu and the Philly Flash (featuring Sid Haig and Vincent Schiavelli), and Buddy Buddy (featuring Ed Begley, Jr. and Michael Ensign).