NCIS: Los Angeles, 9 p.m., CBS
If you had told people in the '90s that Chris "Batman and Robin" O'Donnell and LL "Mama Said Knock You Out" Cool J would star together in a CBS procedural that also happens to be one of TV's highest-rated shows, no one would have believed you. You know what, come to think of it, we still can't quite believe it.
Fargo, 10 p.m., FX
Why do we love Fargo? Because unlike so many other anti-hero dramas, the heart of the show isn't bad boys Lester or Lorne, but Molly (Allison Tolman), a do-gooder intent on plowing through the evil muck of her Minnesota town. Go get 'em, Molly!
Nashville, 10 p.m., ABC
Wow, good girl Scarlett is just now having a breakdown? We were sure that would've happened at least five episodes ago.
The Americans, 10 p.m., FX
In case you needed another reason to watch this utterly captivating show (no, really, do you? We've got about 1,000), legendary rocker Pete Townshend is making his first foray into television with an original song for tonight's episode.
iHeartRadio Music Awards, 8 p.m., NBC
Rihanna, Justin Timberlake, Imagine Dragons, Maroon 5, and Macklemore & Ryan Lewis are vying for artist of the year at these awards given out by the iHeartRadio digital audio service. Why any of this matters, we're not sure, but hey, look, celebrities!
Grey's Anatomy, 9 p.m., ABC
Tonight, Cristina (Sandra Oh) seeks Meredith's (Ellen Pompeo) advice as she considers her future at the hospital. Spoiler alert: Cristina's probably going to not be wandering the halls of Grey-Sloan Memorial hospital much longer, considering Oh is leaving the show after this season's May 15 finale.
Shark Tank, 9 p.m., ABC
A flower merchant comes before the sharks with a business that revolves around goods grown on an active volcano. Uh, that doesn't seem worth the risk. We can go down to Home Depot right now and get you a nice bunch of perennials.
140th Kentucky Derby, 4 p.m., NBC
Held for the 140th time at Churchill Downs in Louisville, the first leg of Thoroughbred racing's coveted Triple Crown is run at 1 1/4 miles. Sure, that's great, but what about the hats? The mint juleps? Oh, some people actually care about the racing? Gotcha.