The Long Road Home (S02E12)

The Beast has taken control of Planet Rock and begins to gather its inhabitants. Meanwhile, the battle rages on at the Prison Planet, where Graveheart, Cryos, Jade, and Femur manage to reunite. The Sand people discover the Prison Planet and help navigate it back to the Alliance system. Upon arrival, the planet reappears in the space between the Beast Planet and Planet Rock. Just as the Beast Planet's claw reaches for the Prison Planet, Sternum powers up the teleport engines, whisking both planets away to an unknown destination.