“Secret Millionaire,” 7 p.m., ABC (new)
The fourth season gets underway as the founder of Auntie Anne's Pretzels works with grass-roots organizations in Baltimore.
“Big Brother,” 7:01 p.m., CBS (new)
The next batch of nominations for eviction are revealed.
“The Killing,” 8 p.m. to 10 p.m., AMC (new)
In the Season 3 finale, Sarah tries to find some peace, while the detectives pick up an unnerving new assignment. Later, Sarah risks her life when someone goes missing.
“Unforgettable,” 8 p.m., CBS (new)
Does anyone else wonder what's going on with Carrie and Al's relationship? Just me? OK, then. Tonight, Carrie goes undercover with a gang of bank robbers.
“Megalodon: The Monster Shark Lives,” 8 p.m. to 10 p.m., Discovery (new)
Shark Week is on! Our fascination with the great white has never been greater, so the Discovery Channel is offering more hours of programming than ever before. This show looks at a deadly attack off the coast of South Africa.
“Falling Skies,” 9 p.m., TNT (new)
Season 3 ends with the 2nd Mass destroying an important base, and more “aliens” arrive on the scene.
“The Newsroom,” 9 p.m., HBO (new)
Will's poor interview with a protester hinders future access for Neal and Jerry, while Jim helps Hallie get an important interview.