2.8 End of Eternity

The Alphans unknowingly release a psychopathic alien kept within a passing asteroid after blasting their way into a chamber inside.  At first he appears fatally injured and “dies”.  However, he fully recovers and reveals himself to be Balor, a scientist cast out from his world Progron within a prison made of “living rock” after discovering and giving his people the secret of immortality.  The liberated one repays his kindness by terrorizing and wreaking destruction among the base and Koenig must risk his own life in order to stop a madman who cannot be killed.