Valley of Secrets

Valley of Secrets''' is the ninth episode of Tenkai Knights. It first aired on October 19, 2013 on Cartoon Network in the United States.'''

Plot
Commander Beag sacrificies himself the save the Tenkai Knights from falling down, causing them to develop a new Robofusion. They soon find out Beag is trapped in the Valley of Secrets and go to rescue him. They also find the fifth and last Dragon Cube inside the Valley.