Big Brother (8pm, CBS) - Season 15 starts tonight with house guests begin introduced and entering the compound.
MasterChef (8pm, Fox) - The contestants deal with a mystery box challenge that involves an unusual ingredient and a limited pantry, and Season 3 winner Christine Ha surprises the chefs. Later, a meal is prepared for a wedding party.
Franklin & Bash (9pm, TNT) - Peter's mother (Jane Seymour, left) is arrested for prostitution, so the guys take action to prove her innocence. Elsewhere, Damien tries to win over a judge in a bid to gain his endorsement.
Royal Pains (9pm, USA) - Hank investigates Boris' death and uncovers something surprising. Divya and Jeremiah visit a forward-thinking hospital in Savannah, where they tend to a minor-league baseball player.
How To Live With Your Parents For the Rest of Your Life (9:30pm, ABC) - In the series finale, Polly helps Natalie get into a Magnet school.
Futurama (10pm, Comedy Central) - Fry befriends a young monster after being marooned on a distant planet.
The Exes (10:30pm, TV Land) - Holly's boyfriend tells the guys he doesn't want them around when they're together, which forces Holly to choose between playing poker or going on a date.