Passing Through Boomer, commonly referred to as P.T. Boomer or just Boomer, was a character who was originally going to be the main antagonist in Thomas and the Magic Railroad, but was cut to the film due to the test audiences complaining that he would be too scary for the film's target audience. His role was replaced by Diesel 10 (who was originally the secondary antagonist) and Boomer himself was demoted into making a cameo appearance in the film instead. He was portrayed by the late Canadian actor, Doug Lennox.