Reno goes undercover to find two brothers who brutally beat him, but his plan becomes complicated when he falls for the ex-wife of one of the men.
Now safely back on Moya, Crichton learns of the Scarrans' intention to invade Earth. He feverishly analyzes his wormhole data and comes up with a way to collapse the wormhole to Earth - but the method is not one that he can implement alone. Meanwhile, Braca demands Scorpius be released from Moya and returned safely to his Command Carrier - and Aeryn has a few surprises of her own, including the identity of her baby's father.
The crew travels through a wormhole to Earth, 1985, and Crichton finds he has somehow disastrously changed the course of time - his father Jack is now slated to fly the doomed Challenger mission. Lying low in Crichton's home town, the 'aliens' use the timely Halloween celebrations to remain (almost) anonymous, while Crichton tries to revert the timeline - in the process putting his younger self in mortal danger.
Moya transports the remains of Talyn to a sacred Leviathan burial ground. Those on board are at a crossroads, each wanting to pursue a separate path. Crichton dreams of returning to Earth with Aeryn at his side, but Aeryn is unsure. Upon entering the graveyard, Moya is attacked by a huge male Leviathan. The crew must team up once more to save their home, but it seems that no matter which way the battle goes, their intertwined fates are sure to unravel.
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