Five guys, two sides, one room, no memory: Unknown’s premise grabs you by the short ‘n’ curlies as Jim Caviezel and assorted know-the-face actors wake up with gas-induced amnesia in an abandoned warehouse. Judging by the bullet wounds and handcuffs they’re all part of a kidnapping gone wrong; but who are the abductors, who are the abductees and which one’s the undercover cop? “It’s like a reality show as a movie,” claims co-star Greg Kinnear in 45-min Making Of Journey Into The Unknown, a fragmented, scrappy puff piece that’s less comprehensive than its running time suggests (high point: Swedish thesp Peter Stormare recalling how Caviezel, the man who once played Jesus Christ, accidentally broke his schnozz during shooting: “It was like an asteroid hitting me in my head.”). Though it runs barely twice the length, the film itself, with its choppy pace and perfunctory twist, proves just as forgettable.

