Tonight's Best TV

A Daily Guide to Notable Shows

11:00 a.m. Disney XD

Marvel's Avengers Assemble

Iron Man and Co. come together in cartoon form for kids. They still battle the bad guys, only this time, it’s in 30-minute segments. — Erin Strecker

9:00 NBC Series Finale

Smash

At times, there have been so many unpleasant characters crammed into Smash it was as if producers were trying to figure out how many clowns could fit in one Volkswagen. But as the series takes its presumed final breath with this season's finale about life-ordeath Tony hubbub, I find that I've watched every episode, that the sneaky song ''Broadway, Here I Come!'' is camping in my head, and that I want to pin medals on the actors who've glowed despite the drama's thousand course corrections (Megan Hilty, for one, is like a lantern). The story of Smash, onscreen and off, is the story of gifted people trying to make a show not suck. It's no small compliment to say they'll have died trying. — Jeff Giles

9:00 HBO

Behind the Candelabra

Michael Douglas is Liberace. Matt Damon is his young lover. Matt Damon's hair is...I'm not sure anyone can answer that. — Jessica Shaw

10:00

Mad Men

Joan goes to the beach. And I'm pretty sure we're all thinking about the same thing right now. — Jessica Shaw