Plot summary
Atarah uses a special device to trap Fitz and Simmons inside their own minds, forcing them to work together to figure out time travel logic. While imprisoned, Fitz learns from a reluctant Simmons of her time-traveling adventures, including the deaths of his alternate future self and Coulson. The two of them are then pursued by Fitz's Framework persona as well as an undead Simmons, formed from her suppressed pain and bad memories from throughout her life. After a brief argument, Fitz and Simmons reconcile and leave the containment module to face their fears, only to find them making out.
They are then freed by Enoch, who has had second thoughts about his allegiances and managed to overpower Atarah and the other Chronicoms. The three of them teleport away to an unknown destination. Back on Earth, Daisy briefs Mack on Fitz and Simmons' situation and learns that Earth is being invaded by the same creatures that are responsible for the Chronicom home world's destruction.
Credits
Adapted from Wikipedia contributors, Agents of S.H.I.E.L.D. season 6. HTML formatting and reference markers removed.