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HBO’s going gangsta on fall, 1920s-style, telling broadcasters who once ruled September that the cabler’s initials now stand for Hey, Bring it On.

Scheduling the premiere of “Boardwalk Empire” Sept. 19, the night before the fall season makes its official start on the broadcast networks, shows that HBO is taking the same no-holds-barred approach as its “Boardwalk” characters. The Atlantic City bet is no longshot: Steve Buscemi shines as a New Jersey politician cashing in on Prohibition, and he’s only one of a host of compelling characters.

With more original programming produced on cable in general, there was bound to be increased fall cable encroachment. Here are some other premieres to track:

“Terriers” (FX, Aleady preemed)

Before Shawn Ryan takes Fox viewers on a midseason “Ride-Along,” he is unleashing this San Diego-based series about a couple of seedy private detectives (Donal Logue, Michael Raymond-James).

The Increasingly Poor Decisions of Todd Margaret (IFC, Oct. 1)

A guest appearance by fellow “Running Wilde” star Will Arnett helps David Cross kick off this Blighty-set half-hour.

“Luther” (BBC America, Oct. 17)

Idris Elba (“The Wire”) stars as a volatile British detective who puts his job in danger after almost killing a child murderer. Not only has his wife left him for another man, Luther has a sexy killer keeping tabs on him.

“The Walking Dead” (AMC, Oct. 31)

The zombie apocalypse is here, and a hearty group of survivors led by cop Rick Grimes (Andrew Lincoln) tries to stay in the land of the living.

“Great Migrations” (Nat Geo, Nov. 7)

This high-def series travels the globe, giving viewers an unprecedented peek into the world of animals staying on the move to survive.

“Conan O’Brien” (TBS, Nov. 8)

After nearly two decades at NBC, Coco kicks it cable-style beginning this fall.

“Sarah Palin’s Alaska” (TLC, Nov. 14)

Mark Burnett teams up with the buzzworthy Palin for an exploration of her home state.