Voltron: The Third Dimension — Season 1, Episode 12: Dark Heart
Animation, Action & Adventure, Kids • 30 min • 2 seasons, 26 episodes • ★ 8.3/10
Episode synopsis
Haggar seeks to avenge the break up of her relationship with King Alfor. She imprisons Alfor's spirit in a Crystal Robeast, which soon does battle with the Voltron Force. But if they destroy the robeast, they will also destroy Alfor's spirit.
About Voltron: The Third Dimension
When the evil Prince Lotor escapes from prison and forms an alliance with Witch Haggar to create monstrous new Robeasts to threaten the galaxy, it's up to the Voltron Force to once again defend the universe