Robert Blake would make his final appearance on this series. He would not be allowed back on the show, thanks to the Bureau. When filming In Cold Blood in 1967, Mr. Blake made statements about criminals that displeased Director J. Edgar Hoover. As a result, Mr. Blake was barred from the series. Not that it mattered, though: Mr. Blake's movie career, which began with the Little Rascals back in the 1930s, would resurge with In Cold Blood. He would later win an Emmy for the ABC crime series Baretta.
This is the first time that Marvin Miller narrates an episode, providing a distinctive anchor for each episode.