“MasterChef Junior,” 7 p.m., Fox (new)
The kids take over the kitchen in this new reality series. In the premiere, 24 cooks between the ages of 8 and 13 prepare seafood, pasta and dessert dishes.
“Undercover Boss,” 7 p.m., CBS (new)
The fifth season starts with the Twin Peaks CEO working at his sports bar and grill.
“Last Man Standing,” 7 p.m. to 7:31 p.m., ABC (new)
Mike encourages Vanessa to teach Eve how to drive, while Mandy wants Mike to stop giving Kyle projects to do around the house.
“The Neighbors,” 7:31 p.m., ABC (new)
After the Weavers explain the meaning of April Fools' Day, Larry tries to pull a prank.
“Hawaii Five-0,” 8 p.m., CBS (new)
The season four opener sees McGarrett and Wo Fat narrowly escaping prison, while gunmen storm Five-0 headquarters and kidnap Catherine.
“Blue Bloods,” 9 p.m., CBS (new)
Season four starts with the arrest of a supposed cop killer, but a lack of evidence forces Erin to drop the charges — causing friction in the family.
“What Not to Wear,” 9 p.m., TLC (new)
Stacy and Clinton compete in a makeover for twins who lead separate lives but dress in the same dull way.