The Sixth Column (1970)

Name: The Sixth Column
Genre: Science Fiction, TV Movie
Released: 1970-03-10
Duration: 74 min
Cast: Lloyd Bridges, Angie Dickinson, Harry Basch, Daniel J. Travanti, Allen Jaffe

Two different alien races are at war. Representatives of each race have landed on Earth to battle it out here, but they've taken human form and they can only spot other aliens through the use of special glasses.