'Serova was a female Hekaran scientist in the 24th century. In 2366, she developed theories regarding damaging effects of warp travel on the fabric of space. (Last Unicorn RPG module: All Our Yesterdays: The Time Travel Sourcebook) Approximately four years later, in 2370, she sacrificed her life to prove her theories correct while working with her brother, Rabal, and the crew of the USS Enterprise-D. (TNG episode: "Force of Nature")