Not the first time the Kravitzes have split up. In Illegal Separation (1965) from season 1, it was Abner who caused trouble by moving in with the Stephenses.
The title is from the youth culture of the late 1960's when a couple (dating or married) go their separate ways in a separation or a divorce.
As Hogerdorf pulls out of the Stephens' drive way, the background street can be seen. It is a very different location than usually seen during the series.
There is no witchcraft for the first two thirds of this episode.