Highway Patrol season 2 episode 3
Episode title: Trailer Story
Steve Talbot is a jewel thief who likes nice automobiles, and the Highway Patrol knows this. So Talbot flees capture after a job in an old junker. This gets him past the roadblocks but he soon is stranded on the side of the road. He hijacks a newly married couple pulling a trailer and Dan passes the trio through, not wanting harm to come to the civilians. But in passing the blockade, they unknowingly pick up a new rider.
