Ep 16. Checkmate

In Smallville season 9 episode 16 titled "Checkmate," Clark teams up with Tess to investigate a mysterious new villain who has arrived in town. Meanwhile, Oliver seeks out Chloe's help to find a way to stop the villain's plan, and discovers a shocking secret about her. Lois also gets in on the action when she uncovers a plot to kill a government official, but finds herself in danger when she becomes the prime suspect. As the mystery deepens, Clark and his friends must use all of their skills and resources to uncover the identity of the villain and prevent them from carrying out their deadly plan. The episode is filled with action, suspense, and surprising revelations that will leave viewers on the edge of their seats.