I don’t recall the first time I heard “Third,” but I know I was genuinely excited about it. Portishead — Beth Gibbons, Adrian Utley, and Geoff Barrow — is not a prolific band. Their first album, Dummy, was released in 1994; their second, the eponymous Portishead, in 1997. Third didn’t arrive for another eleven years. Appropriately, it reflects a mature band reaching out, expanding its sound, layering new styles on top of their spooky, trip-hop instrumentation. No song on Third had a greater impact on me than “Threads.”