LIVE: Reprising an ambitious stunt from 2010, this series presents tonight’s episode live – with different versions for the East and West Coast, so you Lefties don’t have to feel left out. The plot has the show-within-a-show, TGS, being ordered by budget constraints to stop doing live shows – making the premise as meta as this prime-time gimmick is unusual. Tina Fey and Alec Baldwin are comfortable in the arena of live TV, of course – but the lack of a safety net always makes things more interesting. (New version at 8:30 p.m. WT.)