Ultraman Ace: S1 E6 - Solve The Mystery Of The Transforming Terrible-Monster! Ultraman Ace

The Shinsei spaceship suddenly disappears from the radar while on its way back home from the moon. The pilot, Koyama, miraculously returns alive, but is secretly possessed by Terrible-Monster Brocken. His son Atsushi notices something wrong, and decides to inform TAC, but...