Ep 38. Raid of the Red Berets

Lotor sends his special forces to Planet Arus under the cover of night. There, the stealthy soldiers terrorize the people, causing them to lose faith in the protection of Voltron. Out of their minds with fear, the people turn even on the good Princess Allura and the Castle of Lions. Before the Voltron Force can come up with a solution, the special forces manage to disable the Black Lion by sabotage!