Lieutenant Natasha "Tasha" Yar, played by Denise Crosby, is a character in Star Trek: The Next Generation. In the fictional series, the character served as chief of security aboard the USS Enterprise-D for the first season.
Crosby left the series near the end of first season, but reprised the role in "Yesterday's Enterprise" and "All Good Things...".
Development and casting
Inspired by the character of Vasquez in Aliens, the character was originally to be named 'Macha Hernandez' and was set to be played by Jenette Goldstein. Goldstein was replaced by Marina Sirtis. At that time, Denise Crosby was set to play Deanna Troi, but she and Sirtis switched roles before production began.
The back story for the character states that Natasha (Tasha) Yar (Ukrainian: Наташа "Таша" Яр), of Ukrainian descent, was born on Turkana IV, a colony that fell into chaos and eventually severed ties to the United Federation of Planets. Tasha learned to defend herself on the streets and avoid rape gangs. She left Turkana IV at age 15, leaving her younger sister Ishara behind, and later attended Starfleet Academy.
After watching Yar cross a minefield to save a colonist, Jean-Luc Picard requested that she be assigned to his next command. She later becomes chief of security and chief tactical officer aboard the USS Enterprise-D, some time prior to the beginning of the series.
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