In the opening shot of Limitless with Chris Hemsworth, National Geographic's six-part documentary streaming on Disney+, the actor stares into the camera, his neon blue eyes arresting against a black background. His first words: "Stress. It definitely affects my sleep, and this is going back a few years. This is not such a big issue these days." He takes a beat, rethinks that, chuckles, and admits, "Actually, that's not true. It is."
Chris Hemsworth Tests Himself in Nat Geo's "Limitless" on Disney+
