Relieved that a recent stabbing was, in fact, an event staged to test their memories, ten volunteers agree to undergo a second nightmare—an armed robbery during which one of them is abducted. This program records the assault and its scientific ramifications. Thanks to tiny eye-tracking cameras, experts can determine exactly what each test subject focused on when confronted by the shockingly convincing assailants. Even so, a subsequent police lineup and experiments with facial-recognition technology can’t prevent two innocent men from being wrongly identified. Detectives must complete elaborate cross-referencing procedures to compensate for faulty witness memories. Produced by the Open University. (59 minutes)