Bull is an American drama television series starring Michael Weatherly. CBS ordered the program to series on May 13, 2016, and it premiered on September 20, 2016. The show is based on the early days of talk show host Dr. Phil McGraw's career, when he was a trial consultant. On October 17, 2016, CBS picked up the series for a full 22 episode season. An additional episode was ordered in November. On March 23, 2017, CBS renewed the series for a second season, which premiered on September 26, 2017.