TV HIGHLIGHTS

The 51st Annual CMA Awards, 8 PM on Ch. 22

and Ch. 9: Carrie Underwood and Brad Paisley mark their 10th anniversary as hosts of this event, as country music again honors its own at Nashville’s Bridgestone Arena. Miranda Lambert leads this year’s nominees with five bids, while Keith Urban and Little Big Town are tied with four each. Eric Church, Maren Morris, Thomas Rhett and Chris Stapleton each have three ... and a posthumous nomination went to Glen Campbell, for a collaboration with Willie Nelson.

Law & Order: Special Victims Unit, 9 PM on Ch.

2 and Ch. 5: The death of a teenager leads Rollins (Kelli Giddish) to go incognito at a rehabilitation center that was among the last places the young woman was seen alive in the new episode “Unintended Consequences.” Benson (Mariska Hargitay) still has big questions about Sheila (guest star Brooke Shields). Peter Scolari (“Bosom Buddies”) and Annie Corley (“The Bridges of Madison County”) also guest star. Ice T, Peter Scanavino and Raul Esparza also star.

Iron Chef Showdown, 9 PM on FOOD; 12 AM on

FOOD: Whose cuisine reigns supreme? That’s the familiar question as this old favorite returns with only a few modifications. In tonight’s series premiere,“Big Thanksgiving Battle,” Florida chef Lindsay Autry and Chicago culinary star Matt Kerney prepare their best dish using a secret ingredient. The winner of that round, as judged by host Alton Brown, then moves on to a suspenseful showdown with Iron Chef Bobby Flay, with the winner declared by judges John Besh and Antonia Lofaso.