Marvel's Agents of S.H.I.E.L.D. (2013)

S7E2 Know Your Onions

As the identity of the timeline-altering "thread" comes to light, the team finds themselves grappling with a challenging dilemma. Their commitment to safeguarding him at all costs prompts each agent to reflect on their personal beliefs. They must confront the question: is the preservation of their known future worth the potential devastation they might avert?