Last night’s 30 Rock — with its focus on flu shots, sick zombie people hissing germs in your face and thwarted daydreams of lounging around fantasy island “St. Bartleby’s” in dark socks — was a triumph in January-themed programming. Has Tina Fey trumped Julia Louis-Dreyfuss as the NBC TV lady who aggressively can’t dance? Tough call. Press play below.