Hit reality skein marks its territory

TV’s 800-pound gorilla has staked out its territory: “American Idol” officially returns Tuesday, Jan. 16.

“Idol” will bow with back-to-back, two-hour segs on Jan. 16 and 17. The following week, audition segs will continue in the show’s regular Tuesday 8 p.m. and Wednesday 9 p.m. slots.

That means “Idol” won’t make a permanent move to Thursday — at least not yet.

Meanwhile, NBC announced its talent competish “Grease: You’re the One That I Want” will bow Sunday, Jan. 7.

Billy Bush is on board to host, while U.K. TV/legit thesp Denise Van Outen will co-host.

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