A handful of the minds behind the hit NBC sitcom "30 Rock" are recalling the difficulty they had working with Alec Baldwin, including an occasion in which he allegedly threatened to assault a director. The Emmy-winning "30 Rock" followed the lives of the writers and actors behind an NBC sketch show inspired by "Saturday Night Live." Baldwin appeared on the show for seven seasons as Jack Donaghy, Vice President of East Coast Television and Microwave Oven Programming for General Electric.