13. Principia

When the rift begins to reopen, Fitz sends the team to search for more gravitonium. The team hunts down a lead in Baton Rouge; Mack reunites with his school mate, Tony Caine, who has been helping to redeem scientists coerced into working for Hydra through Cybertek Industries. Caine states that the gravitonium was in transport aboard the Principia, a Cybertek ship that went missing. Deke realizes the gravitonium may have been activated by the lightning storm, sending the Principia into the sky. Following Deke's theory, the team finds the Principia suspended in the atmosphere and discovers most of the gravitonium is gone, leaving only a small portion to sustain the ship.

As Mack collects the remaining gravitonium, a group of Hale's robotic soldiers ambushes them. The team successfully escapes the ship before it plummets back to Earth. Upon hearing his mother's saying in an exchange between Simmons and Yo-Yo, Deke realizes Fitz and Simmons are his grandparents. Meanwhile, General Hale continues to form her team by attempting to recruit Werner von Strucker, whose memory was enhanced after S.H.I.E.L.D. revived him from a vegetative state. While Strucker initially rejects Hale's offer, Ruby convinces him to stay.