“Miles Ahead’ (*1/2 out of four) was a superficial biography about legendary jazz musician Miles Davis (Don Cheadle) whose biggest enemy off the stage was always himself, which led to him becoming involved in drugs, crime, and self-destruction. Film never really shows you how or why Davis became so embroiled in music and why this became such a passion for him and instead focuses on his involvement in drugs and crime and his relationship with an investigative reporter (Ewan McGreggor). Cheadle is OK as Davis but his voice is strained and McGreggor is unusually awkward. This was a labor-of-love for star Cheadle in his directing debut but a great film about Davis still remains to be made.