Fox’s 9-1-1: Lone Star finishes its run on a cataclysmic note, with an asteroid crash and a nuclear meltdown. Original coach Adam Levine returns to The Voice, with Kelsea Ballerini joining the red chair crew. Lone Star’s Rob Lowe helps launch a new season of HGTV’s Celebrity IOU. It feels like old times on Poppa’s House when In Living Color alum Tommy Davidson joins Damon Wayans and New Girl’s Lamorne Morris reconnects with Damon Wayans Jr.

Kevin Estrada / FOX
9-1-1: Lone Star
The Austin-set 9-1-1 spinoff is going out with a bang — several, it would seem — in the series finale. Last time we saw the crew of the 126, they were hunkered down waiting for an asteroid to hit the state capitol. If that weren’t enough, last week’s prologue suggested a nuclear meltdown also was imminent. There’s a lot to process as the show takes its final bow and plenty of soap operatic business to resolve, including Mateo’s (Julian Works) immigration status, the thwarted adoption hopes of T.K. (Ronen Rubinstein) and Carlos (Rafael Silva), and the precarious state of cancer patient Tommy (Gina Torres), who appeared to have crossed over to the great beyond.

Trae Patton / NBC
The Voice
It’s been a minute, but original coach Adam Levine is back on the revolving red chair he left after Season 16 in 2019. He’ll be joined by new coach Kelsea Ballerini and returning coaches John Legend (his 10th) and Michael Bublé (his second). In the opening “Blind Auditions” round, they’ll respond sight unseen to singers who hope one or more chairs will turn around in their favor. When multiple coaches show an interest, the contestant gets to choose which coach’s team they’ll be a part of. This is the most fun part of any season.

HGTV
Celebrity IOU
Rob Lowe is having a busy night. As Capt. Owen Strand, he says goodbye — or does he? — to his fellow firefighters on 9-1-1: Lone Star, then as himself, Lowe enlists Drew and Jonathan Scott to pay it forward to Carol, his friend and assistant of 27 years. They’ll give her the upgraded kitchen and living spaces she’s longed for, and when Jonathan gets sick, Lowe steps up to work alongside Drew to lay new floors, install cabinets and countertops before the emotional big reveal.

Robert Voets / CBS
Poppa’s House
The set must have been buzzing during this week’s episode, with guest stars bringing echoes of past glories. In Living Color alum Tommy Davidson reunites with Damon Wayans as Poppa’s old radio acquaintance Jarnold, a last option when Poppa needs to find someone to share an extra baseball ticket. The reunion of Junior (Damon Wayans Jr.) with his old friend (New Girl costar Lamorne Morris) is presumably less fraught with baggage.

Robert Voets / CBS
NCIS
Don’t get too excited when wedding bells ring for two members of the NCIS family. It’s a ruse, part of an operation to take down the mob. Followed by NCIS: Origins (9/8c), where the unit looks for the motive behind a break-in of the evidence room.
INSIDE MONDAY TV:
- Below Deck Down Under (8/7c, Bravo): The motor yacht Katina sets sail for the Seychelles off the African coast for Season 3, with Capt. Jason Chambers trying to keep his crew and passengers from going overboard.
- Rescue Hi-Surf (9/8c, Fox): As soon as 9-1-1: Lone Star ends, a new calamity begins when a tsunami warning following an earthquake leads to a Hawaiian evacuation order. But where’s Capt. Sonny’s (Robbie Magasiva) daughter, Ocean (Ka’enaaloha Watson)?
- The Hunting Party (10/9c, NBC): In case you missed last month’s preview, the network repeats the thriller’s pilot, with FBI agent Bex Henderson (Manifest’s Melissa Roxburgh) called back into the field to track down a blacklist’s worth of notorious killers after they escape from a secret prison.
- The Great American Baking Show: Celebrity Big Game (streaming on The Roku Channel): Casey Wilson and Severance’s Zach Cherry host a pre-Super Bowl special that puts pro football players DK Metcalf, Arik Armstead and Tony Gonzalez in the kitchen alongside ESPN’s Katie Nolan and Varsity Blues star Amy Smart to bake their hearts out for judges Paul Hollywood and Prue Leith.