1) “Modern Family” series finale, 9 and 9:30 p.m., ABC, with an overview at 8. For 11 seasons and 22 Emmys (five for best comedy), this has offered consistently clever comedy, built around a lovingly mismatched family. “Modern Family” (shown here in a previous episode) started with Mitchell and Cam adopting a baby; now they have their new baby and new house. Also, Phil and Claire decide that one of the kids must move out. And Gloria is successful at work, but frets that her husband and son don’t really need her.
2) “Who Wants to Be a Millionaire” return, 10 p.m., ABC. Fresh from his “Modern Family” finale, Eric Stonestreet – a two-time Emmy-winner as Cam – faces another challenge. He’s the first contestant in this edition, which has celebrities playing for charity. Will Forte is next and Jimmy Kimmel hosts.
3) “The Masked Singer,” 8 p.m, Fox. Let’s give Gronk some credit: After winning three Super Bowls, Rob Gronkowski was in the post-Super Bowl “Masked Singer” and survived. He cleared two more rounds – even beating music great Chaka Khan – but last week was the first person bumped in the semi-finals. Now eight singers remain; Yvette Nicole Brown (“Community”) joins the panel.
4) “Lego Masters,” 9 p.m., Fox. Two duos have dominated: Tyler and Amy (young-marrieds) and Mark and Boone (bad-beard buddies) each have three of the eight weekly wins; neither has been in the bottom two. A week from the finale, they’re joined by Sam and Jessica (no wins, three bottom-two). It’s a “Star Wars” night, with some superb builds … plus one collapse, 17 minutes before the deadline.
5) “Chicago Fire,” 9 p.m., NBC. When the alarm sounds, firefighters have a fresh problem: Protesters – upset because their own neighborhood firehouse closed – have blocked the trucks. That sets up a serious question: What do you do if you disagree with a protest’s methods … but kind of agree with its issue? The result is a solid and muti-layered hour that’s well-played.