Fallon's ratings success on "The Tonight Show" also translated to his holiday special, which drew 4.2 million and won the 10 p.m. timeslot ... City Rockettes from the top of Rockefeller Center.

But it also left Jay Leno, the longtime host of the still top-rated Tonight Show ... NBC offered Leno an hour-long nightly talk show at 10 PM. Although he was dubious the talk show format would ...