Hikari Sentai Maskman Zeba! His Hair-Raising Secret Identity Season 1 Episode 50 Airdate: February 20, 1988 Synopsis Ial and the Maskman obtain a ball that reveals the truth behind Emperor Zeba, even as he begins his final plan to raise the Underground Castle and cover the world in darkness. ← The Revived Princess Ial All episodes The Great Destruction of the Underground Empire Castle! →