Big Brother 8 p.m., CBS
Every summer, this reality TV series hits CBS like a case of scabies. This is the 15th season of houseguests living on a compound and acting like porn stars, with Julie Chen (pictured) as their Hugh Hefner. It’s on the air three nights a week — Sunday, Tuesday, and Wednesday — but you know that’s not enough. So you can also pay for a subscription for the 24/7 live feed on CBS.com.
The Lookout 10 p.m., ABC
Here’s a show that Senator Elizabeth Warren could love. The idea is to protect consumers from getting scammed and to help them get maximum value for their money. Expect to find reporters chasing down rich business owners, exposing mold-removal racquets, and raiding hotels to look for bed bugs. The investigations are handled by Bill Weir and Cynthia McFadden (pictured) of “Nightline.”
The American Baking Competition 9 p.m., CBS
Wait, the brownies make you hungry?
Toy Hunter 9 p.m., Travel Channel
McDonald’s puppets. I’m still looking for Phil A. O’Fish.
Southern Fried Homicide 10 p.m., ID
KFC-ya.Matthew Gilbert can be reached at email@example.com. Follow him on Twitter @MatthewGilbert.