Three O'Clock High Cast

Casey Siemaszko plays Jerry Mitchell, a high school student who finds himself in a nerve-wracking situation when he accidentally challenges the school bully, Buddy Revell, to a fight.

Annie Ryan portrays Franny Perrins, a student at the high school who interacts with Jerry Mitchell during the chaotic events leading up to the showdown at three o'clock.

Richard Tyson takes on the role of Buddy Revell, the intimidating school bully who Jerry Mitchell must face in a fight after a misunderstanding escalates their conflict.

Stacey Glick plays Brei Mitchell, Jerry Mitchell's younger sister who gets caught up in the tension at school as her brother prepares to confront Buddy Revell.

Jonathan Wise portrays Vincent Costello, a student at the school who observes and reacts to the escalating situation between Jerry Mitchell and Buddy Revell.

Jeffrey Tambor plays Mr. Rice, a teacher at the high school who becomes involved in attempts to resolve the conflict between Jerry Mitchell and Buddy Revell.

Philip Baker Hall takes on the role of Detective Mulvahill, a law enforcement officer who responds to the tense situation at the school as it reaches its climax.

John P. Ryan portrays Mr. O'Rourke, another teacher at the high school who becomes entangled in the events surrounding Jerry Mitchell's impending fight with Buddy Revell.

Mitch Pileggi plays Duke Herman, a school staff member who witnesses the escalating tension between Jerry Mitchell and Buddy Revell, adding to the suspense.

Paul Feig portrays the Hall Monitor, a school official responsible for maintaining order on campus who becomes involved in the aftermath of the showdown between Jerry Mitchell and Buddy Revell.

Yeardley Smith plays a Cheerleader at the high school, adding to the background of the school environment and the diverse group of students within it.

Liza Morrow portrays Karen Clarke, a student who navigates the tense atmosphere at the school as rumors and tensions swirl around the impending fight between Jerry Mitchell and Buddy Revell.