The Bachelor Returns For Season 24 With an Unexpected Reunion

Trailers for tonight's three-hour Bachelor premiere have teased a shocking reunion between this year's Bachelor Peter Weber and his Bachelorette ex Hannah Brown that threatens to derail the season before it starts. Also today: premieres of America's Got Talent and Manifest, and new episodes of All Rise, Bob Hearts Abishola, and The Neighborhood. Here's what's new and noteworthy on TV this Monday:

SEASON PREMIERE: Airline pilot Peter Weber is ready to meet the 30 women vying for his affection this season on The Bachelor, but will Hannah Brown's suprise appearance throw a wrench in the works? Watch the preview  8:00 PM ET on ABC

SEASON PREMIERE: The second installment of America's Got Talent: The Champions brings winners and top contenders from around the world back to compete in a best-of-the-best style matchup that will crown the winner champion of the world. Britain's Got Talent's Alesha Dixon will join judges Simon Cowell, Heidi Klum, and Howie Mandell as they narrow down the field of 40 contestants. Watch the preview. 8:00 PM ET on NBC

SPECIAL PRESENTATION: Castmembers past and present reunite for a Below Deck 100th Episode Celebration, a special episode of Watch What Happens Live with Andy Cohen. Ben Robinson, Eddie Lucas, Kelley Johnson, Amy Johnson, and Nico Scholly are just a few of the alums exopected to join Captain Lee and Kate Chastain in the clubhouse. 10:00 PM ET on Bravo

SEASON PREMIERE: The supernatural drama Manifest returns for a second season as the passengers of Flight 828 come to believe they're living on borrowed time after Griffin's shckiong death at the end of Season 1. Watch the preview. 10:00 PM ET on NBC

NEW EPISODE: Wendie Malick and Marilu Henner guest star in a new episode of Bob Hearts Abishola that sees everyone struggling to pull Dottie (Christine Ebersole) out of her depression.  8:30 PM ET on CBS

NEW EPISODE: Lola (Simone Missick) is questioning her personal brand of creative justice tonight on All Rise, but it's a good bet that a new case involving a Senator's son will get her trusting her instincts again. 9:00 PM ET on CBS

NEW EPISODE: Dave (Max Greenfield) finds his patience pushed to the limit on The Neighborhood when his freeloading sister in law Brittany (Deborah Baker Jr.), suddenly shows up with plans for an extended stay. 8:00 PM ET on CBS

ALSO TODAY

• The American Experience explores the rise and fall of Senator Joe McCarthy and what it means to be on the right and wrong sides of history. 9:00 PM ET on PBS
• Kids Baking Championship welcomes 12 new competitors as it kicks off season 8. Valerie Bertinelli and Duff Goldman host. 9:00 PM ET on Food Network

Mike Attebery is Senior Editor at Primetimer and the author of seven mystery thrillers. Follow him on Twitter at @mikeattebery.