TriStar Television, Inc. (first spelled Tri-Star, and abbreviated as TT) was an American television production studio that was a division of Sony Pictures Television, a Sony Pictures Entertainment company. TriStar Television was launched in March 1986 by TriStar Pictures, and remained a joint-venture between Columbia Pictures, CBS, and HBO until it was acquired by Sony, the parent of both Columbia and TriStar. After a purchase by Sony Pictures Entertainment, both companies Columbia Pictures Television and TriStar Television merged and formed Columbia TriStar Television on February 21, 1994. The television studio was relaunched twice, most recently as a specialty label for Sony Pictures Television. The entity was originally a sister company of Columbia Pictures Television, which was shut down in 2001.