Starring: Martin Freeman, Sam Rockwell, Mos Def, Zooey Deschanel, Bill Nighy, Anna Chancellor, John Malkovich, Warwick Davis, Alan Rickman (voice), Stephen Fry (voice) It opens with a perfectly choreographed dolphin musical number, and ends with the disembodied head of deceased author Douglas Adams. This is the long awaited adaptation of his novel, “The Hitchhiker’s Guide to the Galaxy,” and as the dolphins flawlessly perform their rendition of “So Long and Thanks for All the Fish” you’ll realize you’re in for one hell of a ride. Don’t panic. It only gets a little weirder.