Explore “Scarlet Begonias,” from its trans-Atlantic origins (including the Dead’s surprising Bob Marley connection) to Cornell ’77 & beyond, featuring the Wall of Sound’s stop at the Hollywood Bowl (with more unheard Owsley Stanley) & a visit from Vampire Weekend’s Chris Tomson.

The Deadcast explores Phil Lesh’s masterpiece “Unbroken Chain,” its mysterious lyricist Bobby Petersen, & digs into the luminous synth with Ned Lagin himself; plus, the story of the album title & art with the Grateful Dead Records crew & a visit from Animal Collective’s Avey Tare.