What if Farrah Fawcett had come back full time to replace Kate Jackson?
Instead of the one-season misfire with Shelley Hack? Her movie career had stalled big time and it would be a few years before she turned it around with The Burning Bed. Maybe she wanted too much money or something so the show was canceled soon afterwards.
They would've in all likelihood, had to pay Farrah a king's ransom to come back though. She apparently, hated the grind of working 14-16 hours a day for six days a week.