"I-yensch, you-yensch:" Rygel and D'Argo negotiate with Scorpius on Crichton's behalf. Talyn's hostile actions lead the crew to a difficult decision about his future. "Into the lion's den, part I: Lambs to the slaughter:" Crichton and the crew board Scorpius' command carrier, launching a secret plot to sabotage his wormhole research. But a Peacekeeper commandant works to destroy their alliance and sign a peace treaty with the Scarrans. "Into the lion's den, part II: Wolf in sheep's clothing:" Crichton is forced to go to extreme measures to destroy the Peacekeepers' wormhole research, and is betrayed to Scorpius. Two comrads must make the ultimate sacrifice. "Dog with two bones:" The crew encounters a hostile Leviathan while trying to lay their friend to rest. Crichton and Aeryn must decide the fate of their love as the rest of the crew prepares to go their separate ways.