'Up All Night' (NBC)

Premieres: Thursday, Sept. 20 at 8:30 p.m. Expect to see: Lots of changes. The show has a new regular in Luka Jones, playing Reagan's (Christina Applegate) more mellow brother, and it's shaking things up on the work front as Ava's talk show gets canceled. Which means Chris (Will Arnett) might be headed back to work after a year as a stay-at-home dad. -- Rick Porter, Zap2it
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