Colonel Jessup is a fictional character from the play and film "A Few Good Men," created by Aaron Sorkin. He is portrayed by actor Jack Nicholson in the movie adaptation. Jessup is a high-ranking officer in the United States Marine Corps and is known for his strong leadership and unwavering commitment to military values. In the story, Colonel Jessup is involved in a controversial case concerning the death of a Marine. His character embodies themes of authority, morality, and the complexities of military justice, ultimately leading to a dramatic courtroom confrontation that questions the ethics of his actions and decisions.