The Substitute 4: Failure Is Not An Option is a 2001 action film. Starring Treat Williams once again as Karl Thomasson who is now an undercover policeman that must infiltrate a military school's faculty to cease the actions of a white supremacist cult. This was the last entry in the popular "The Substitute" series and was released direct-to-video.Synopsis
Karl Thomasson (Williams), an ex-Special Forces soldier and retired mercenary, is now working as a police detective. One day, he is approached by his old army buddy Teague who gives him a mission: working undercover at a military school where Ted, Teague's nephew, is one of the cadets. Teague believes that the cadets and the student faculty are part of a white supremacist cult being run at the school. Karl accepts the mission and begins working as a history teacher at the school, seeking to expose and eradicate the cult.
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