The Principal and the Pauper

During Principal Skinner's 20th anniversary party at Springfield Elementary, a man named Sgt. Seymour Skinner, shows up, claiming Principal Skinner stole his identity. When Principal Skinner reveals that his real name is Armin Tamzarian and that he assumed Sgt. Skinner's identity when Sgt. Skinner was thought to have died, Armin/Seymour resigns as principal and heads back to Capitiol City.