at Stillwell's workplace who knows him, but Turtle has been murdered by Lester. Stillwell forces Shela to see what her associates are capable of. The two spend the night together, but Stillwell wakes to find Shela gone. Lester and Willard are waiting downstairs. He disarms Lester and uses him as a shield, but Willard callously kills Lester. Stillwell escapes and goes to Caselle's office, but finds him dead. Stillwell's intermittent flashbacks are becoming more regular and detailed. He revisits Dr. Broden. They work out that Stillwell's amnesia is only two days old. Broden helps Stillwell understand that he has been recalling false memories; his mind was replacing traumatic memories. Stillwell realizes he is not a cost accountant, but rather a "physio-chemist" and Calvin's protégé. He normally resides in New York, but the last two years worked in California at a private research facility (which has multiple sub-basement levels) under a man named Sylvester Josephson (Kevin McCarthy). Stillwell visits Calvin's widow who believes he killed Calvin. Stillwell suddenly remembers Calvin falling through a window. He notices a photograph of Calvin with an Army officer that Mrs. Calvin says is Major Crawford Gilcuddy. Stillwell goes to see the Major, where he also finds Willard (who then beats him up), Josephson, and Shela, who is the Major's girlfriend. Stillwell's memory returns completely. He had discovered a method to neutralize nuclear radiation; though ostensibly for peaceful purposes, this discovery would make using nuclear weapons more desirable. When Stillwell went to New York to consult Calvin, he discovered that Calvin, as head of a non-profit agency, was illegally conducting business with the Major. The Major turned off the building's power to prevent Stillwell from leaving. During their argument, Stillwell metaphorically claimed he would become a "cost accountant" for nuclear war. To prevent his discovery being weaponized, Stillwell burned the document containing the formula; as Calvin grabbed for it, he fell out the window to his death. The shocking event caused Stillwell's amnesia. To force Stillwell to recreate his formula, the Major has Willard play Russian roulette with his gun pointed at Stillwell's head. Shela shoots Willard. Josephson grabs her gun, but Stillwell convinces him the Major will not let Josephson live (as he knows too much about the secret project); Josephson calls the police. Stillwell and Shela embrace. Cast Production The screenplay was written by Peter Stone as a follow-up to the hugely successful Charade.