Voir Voltron: Defender of the Universe - Lion Force - Episode 55

Lotor decides to build a new castle in secret, determined to take back the title of King. Under orders from Zarkon, Hagar destroys his castle with her new demolition Robeast. Pidge befriends a stray white cat to get back at the Space Mice, but it turns out to be the Robeast in disguise! When the monster destroys the Castle of Lions from the inside and captures Chedder, it's up to Voltron to hold off the creature while the other mice take to the sky and save their friend!