As we all have at one point or another, Amazon seems to be in the midst of a Grateful Dead kick, first beginning development on a scripted series about the band back in 2015, and now acquiring their 50th anniversary documentary ahead of its world premiere at Sundance this month. Martin Scorsese served as executive producer on Long Strange Trip, which was directed by Amir Bar-Lev and features never-before-seen footage alongside new interviews with the surviving band members. The six-part, four-hour film will debut on Amazon Prime Video in the US and UK on 5/26.