This episode was not included in the late 1960s original syndication package. It did not appear in syndication until the late 1970s.
This episode was recorded on 6-24-65.
Hanna-Barbera originally animated the Bewitched opening title sequence for Screen Gems/Columbia. For this episode, they used the model sheets of the animated "Samantha" and "Darrin" to create their Stone Age "ancestors".