(written from a Production point of view)
Dianne Harper is an actress whose voice can be heard over subspace in 1982's Star Trek II: The Wrath of Khan. This is her only work for Star Trek to date, and her last known acting work. It is also the only known feature film she has ever worked on.
Harper had previously made guest appearances on several television shows in the 1970s, including Marcus Welby, M.D. (in an episode with Cliff DeYoung and Ken Lynch), Emergency! (with Vince Howard), Kolchak: The Night Stalker (starring John Fiedler, in an episode with Michael Strong), Ironside, Happy Days, and The Rockford Files. She also appeared in the 1975 TV movie Crime Club, starring David Clennon, Robert Lansing and Eugene Roche. She was a regular on Days Of Our Lives around 1980-81.