Night Slaves (1970)

In the made-for-television movie Night Slaves, James Franciscus plays Clay Howard, a middle class businessman who is involved in a car accident that leaves him with a metal plate holding his skull together. As bad as this is, he and his wife, Marjorie (played by Lee Grant) are having marriage trouble - unbeknownst to Clay, Marjorie and his friend Matt (Scott Marlowe) are having an affair and Marjorie is planning to leave Clay. But because of the accident, Marjorie accompanies Clay on an r-and-r road trip vacation, which lands them in what seems to be a relaxing little small tourist town. Little do they realize that some odd things have been going on in this town - the townspeople all seem to become zombies at night, congregating in town before being driven off in groups for some mysterious purpose. Everyone is affected, even Marjorie - everyone except Clay. In addition, a mysterious woman appears who seems to be involved with those responsible for the strange events - and Clay finds himself falling in love with her. Leslie Nielsen co-stars as the town's sheriff, and Andrew Prine appears as a local who seems to also be involved with the late night  conspiracy.