"I wish that we'd had at least another year for the writers to have that much time to ramp up to the ending. We sort of found out sooner than we thought we would," Janney told James Corden on The Late Late Show. "We thought, 'Surely, they're gonna want more Mom.' And they decided not." She added that there are "many reasons" why she thinks CBS decided to pull the plug and that "most of them" are "probably money"-related.