The Twilight Zone - The Silence

Jamie Tennyson is an overly talkative member of a private men's club. He is challenged by fellow member Col. Archie Taylor to keep his mouth shut for one year. Should he do so, he would win $500,000. Taylor dislikes Tennyson and if nothing else, finds this a way to get a bit of peace and quiet at the club. Tennyson will live in a room in the club, under observation and will communicate in writing only. As the months go by, Taylor begins to worry that Tennyson may just succeed. He can't believe Tennyson's will but neither party proves to be completely honorable