In the Season 4 finale, Carter and Jo respond to a mysterious attack on the presidential convoy; good-byes are exchanged before the Astraeus mission is launched; and cosmic anomalies threaten Eureka.
The scene opens and it is Launch Day in Eureka. Allison runs up to Jack and says that she is sorry that she ran out on him this morning and he they exchange flirty banter. Fargo and Holly talk to each other and test out the equipment. Fargo talks about their relationship and he suggests that their “first time” be on Titan. Allison hosts a meeting and has Zane lie down. She tells the crew that they are going to be able to rest easy when they are on Titan. Dr. Parrish says that his experiment is going to be able to help them while they are in space and Fargo gives him a hard time about how his experiment is going to Titan without him. They argue and Allison tells them to stop it. Jo goes up to Allison and asks her if she can talk to her and keep it between them. She says that they can. Grace goes up to Henry and asks if six months is not going to be too long. Henry says that it is going to be fine and they kiss. Jack comes in and catches them and says that they have science-y stuff to do. They fire up the FTL for a test drive and everything goes right. Senator Wen comes up and says that they have special guests. ..