Legion — Season 1

Season February 8, 2017 50m Set in Unclear on purpose

A man in a psychiatric hospital is told he is not ill. The show refuses to confirm anything.

Where It Sits

In-Universe Order — number 109 of 158 on the timeline. After The New Mutants. Then Legion — Season 2.
Release Order — number 63 of 158 on the timeline. After Agents of S.H.I.E.L.D.: Slingshot. Then Team Thor: Part 2.