No one gets paranoia like Massive Attack. On Heligoland, with creeping beats and whispery lyrics, the trip-hop vets conjure enough dread to leave kids buggin’ in the chill-out tent. Haunting vocals by TV on the Radio’s Tunde Adebimpe and Mazzy Star’s Hope Sandoval calm the jitters here, but the crew have gotten so comfy just tripping out, they sometimes forget the hooks. ? B?