Fargo is interviewing candidates for the upcoming FTL-powered mission to Titan. His former nemesis, now romantic interest, Dr. Holly Marten, is in town to help him, but he may have some competition for her heart in Dr. Parrish, whose application he summarily dismisses. Carter has other plans – he's hoping to take Allison and the kids on a fun, non-science vacation.
Jo is trying to strike a professional tone with Zane (their relationship has gotten physical) but Jo is doing all she can to shut down any emotional development. Zane has developed a special contact lens called PALs that allows the wearer to detect potential danger in any situation, factoring in mechanical as well as human features, and Jo is the first to benefit from them.
Carter follows suit, and when he speaks to Allison about the Titan mission, he detects that she is lying about not wanting to go. This falsehood comes moments after both of them find out that, in this timeline, she wrote the definitive book on space medicine. Additionally, though her headaches are getting worse, she refuses to see a doctor.
original airdate July 25,2011 rating 1.79 million
song--Eureka Theme song--"Eureka On My Mind" by Bear McCreary