Sony Pictures Television
On September 16, 2002, Sony Pictures Entertainment retired the name "Columbia TriStar" from television and renamed the American studio as Sony Pictures Television and its international division as Sony Pictures Television International. Some shows continued using the CTDT name, although many stopped using it in November 2002, while "Hollywood Squares" continued using it until early 2003.
Sony Pictures Television
SPT's history goes back to 1947, when Pioneer Telefilms was founded by Ralph Cohn, whose father Jack and uncle Harry co-founded Columbia Pictures. Pioneer was bought by Columbia and renamed in November 1948, reincorporated as Columbia Pictures Television on May 6, 1974,
and merged with sister studio TriStar Television (formed in 1986 and relaunched in 1991) to form Columbia TriStar Television on February 21, 1994.