MacGyver 4x04 "Windmill + Acetone + Celluloid + Firing Pin" Season 4 Episode 4 Promo Trailer HD - As MacGyver works quickly to rescue survivors from a collapsed building in Germany, he discovers a new safety threat – a 1,000-pound undetonated bomb from World War II hidden beneath the rubble, on MACGYVER, Friday, February 28th on CBS.