Voltron: Lion Force, Lotor's New Hit Man

S1 E37: An ambitious pilot with a deadly reputation as a loose cannon confronts King Zarkon. He boasts that he can destroy Voltron in exchange for a position of rank. The officers of Planet Doom are not happy, but Zarkon gives the ace pilot the fastest Robeast ever built. With a Robeast faster than Voltron, and a pilot more skilled than the Voltron force, Kieth and the others have their backs up against the wall.