Plot summary
Coulson, Daisy, Fitz, Simmons, and Deke survive the crash and reunite with May in the Zephyr. They meet Samuel Voss, an acquaintance of Deke's father. Up on the Lighthouse, Kasius punishes the inhabitants by cutting off their resources. Flint, Mack, and Yo-Yo go to retrieve the weapons hidden by Fitz and discover Kasius has released the Vrellnexians onto the lower levels. They defeat the Vrellnexians and rescue the remaining inhabitants. On the surface, the team struggles to get answers from Robin and finds a machine built into the Zephyr. While Fitz and Simmons attempt to remove Daisy's inhibitor, May and Coulson find a shard of the time monolith in Voss' locker.
Deke questions Voss about the shard, which belonged to his parents, and gets knocked out. Voss then tries to kill Daisy and impales Robin to prevent her from giving the team answers. Before dying, Robin is comforted by May as she reveals their history and finally tells May how to save the world, a method that will require Flint. In the past, May is shown taking care of Robin and encouraging Fitz to build his machine so they can travel through time.
Credits
Adapted from Wikipedia contributors, Agents of S.H.I.E.L.D. season 5. HTML formatting and reference markers removed.