10. Past Life

Complete story — includes the ending

While Enoch stays on the Zephyr, the team focuses on getting to Flint and rescuing the other Inhumans from captivity. Distraught over Sinara's death, Kasius infects Tye, the Inhuman trainer, with odium, a substance that excites maniacal behavior, and sends him after the team. During a fight with Tye, Coulson seemingly gets infected. Kasius' seer is revealed to be Yo-Yo from the future, one who has lived through the time loop and endured endless torture. She reveals that the team's ultimate return will bring about the end of the world and that the only solution is to let Coulson succumb to his infection. As Flint recreates the monolith, Mack leaves to find Yo-Yo and witnesses her future self's death by Kasius, who consumes the remaining odium and fights him. With help from Simmons, Mack kills Kasius and reunites with Yo-Yo, who is still alive in their timeline. Deke returns to the Zephyr in time to save Enoch and fix the machine, although seemingly at the cost of both of their lives, as the team returns to the present.