I saw some "coming soon" commercials with the BH theme song tune playing, and shots of oil squirting !

Yep, it's on at 4:00 and 4:30 starting January 7!

It's also preceeded by Green Acresat 3 and 3:30.

So in turn:

Magnum, P.I.is replaced by Green Acres

Beverly Hillbillies replaces The Jeffersons, which shifts back to the 9PM weekday slot.