With Devon seriously injured, Rachel's call for help reaches the Astro-medic ship. At the same time an alien spacecraft is also appealing for assistance. The two main doctors - father and son - are at loggerheads: who do they try to save?

Oro returns, offering to repair the Ark's faulty systems and fly them all to settle on Exar, which he claims is much like earth. Devon discovers he's lying, but can only prove it in a debate in which the loser will be killed.