"The Hidden Enemy" is the sixteenth episode of the first season of Star Wars: The Clone Wars. It is the sixteenth episode of the series overall. It premiered on February 6, 2009. It was written by Drew Z. Greenberg and directed by Steward Lee.
Official description Edit
Anakin Skywalker and Obi-Wan Kenobi lead Republic forces in an attempt to defeat the droid armies and free the planet of Christophsis from the Separatist siege. When the Republic is ambushed and forced to retreat, it becomes clear that someone in their midst has set them up. The Jedi believe this infiltration is a Sith-backed operation and go behind enemy lines to investigate. Meanwhile, Captain Rex and Commander Cody set out to uncover the traitor amongst them.