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What to Watch on Wednesday: ‘Mob City’ debuts on TNT and Kirstie Alley’s latest hits TV Land

Milo Ventimiglia stars in “Mob City” on TNT.
Milo Ventimiglia stars in “Mob City” on TNT. Scott Garfield/TNT

Mob City (9pm, TNT) - A new series about an elite mob task force trying to take down powerful criminals in 1940s Los Angeles. In tonight’s 2-hour premiere, Det. Joe Teague ( Jon Bernthal) is bribed during a dangerous blackmail scheme, and a tip leads to a violent act of revenge. Also stars Milo Ventimiglia and Ed Burns.

Also on tonight . . .

Christmas in Rockefeller Center (8pm, NBC) - The 81st annual tree-lighting gala in Manhattan, hosted by Al Roker and Savannah Guthrie, features performances by Mary J. Blige, Kelly Clarkson, Mariah Carey and others.

Saturday Night Live Christmas (9pm, NBC) - Holiday-theme sketches from past SNL shows.

Modern Family (9pm, ABC) - Cam gets ready to coach an important football game that could break a record, but his intensity blocks out the fact that the other team is at a disadvantage.

Kirstie (10pm, TV Land) - In the premiere of this new comedy, Broadway diva Madison Banks (Kirstie Alley) is floored when the son she gave up for adoption nearly three decades ago appears at her stage door. Later, Maddie adapts to being a mom, but finds the virtuous woman who raised her son a tough act to follow, and doesn’t improve the situation by skipping their first family dinner to sleep with a football star. Also stars Michael Richards and Rhea Perlman.

American Horror Story: Coven (10pm, FX) - The century-old rivalry between Marie Laveau and Delphine comes to a head, while Cordelia tries to stop Fiona.