The last two episodes of Legion, giving us extended head trips into the complex minds of Syd and Lenny, respectively, have been so inventive and exciting and unpredictable, I could hardly watch them without leaning fully forward. And tonight, in an episode I haven’t previewed, we accompany David (Dan Stevens) as he’s taken on a tour, and takes us on one, through a series of alternate realities – including one in which he’s long-haired, bearded and homeless (pictured). Whi