One Princess to Another - S1.E45

Sick of his son's failures, King Zarkon himself steps in and puts all his resources behind a huge plan to wipe out Planet Arus. Using the power of a hidden Lazon satellite, Zarkon plans to turn all 500 of his remaining gladiators into an army of Super Robeasts! But Sven gets wind of the plan, and infiltrates the armies of Planet Doom at great personal risk. Sven must find the satellite's location so Voltron can destroy it before it's too late!