Peter Graves shines as a government agent who goes undercover to investigate the use of illegal amphetamines by long-haul truck drivers in this classic crime drama based on a "Saturday Evening Post" exposé. Will he find drugs in the big rigs? Or will his true identity be discovered first? Mala Powers, Chuck Connors, and Robert Williams co-star. 79 min. Widescreen; Soundtrack: English Dolby Digital mono.