Fox 8 pm
Tonight, either Mount Prospect, Ill. native Lee DeWyze or Elliston, Ohio’s favorite daughter, Crystal “Mama Sox” Boxersox, will be crowned the winner of American Idol. Tonight’s super-sized episode will also be Simon’s last.
CBS 10 pm
Shane Casey (Edward Furlong), a serial killer, stole Danny’s badge weeks ago and has been posing as a police officer. In the season finale, Casey zeros in on his next victim, Danny, who is on vacation with Lindsay and their daughter. That doesn’t stop Casey from finding him in an episode that will keep you on the edge of your seat.