Elsewhere on TV ...
MasterChef (7 p.m., Fox/Ch. 13): The 13 remaining contestants compete in a mystery-box challenge involving wild Alaskan king salmon.
Whose Line Is It Anyway? (7 p.m., CW/Ch. 30): Kunal Nayyar and Brad Sherwood are the guests.
Major Crimes (7 and 9 p.m., TNT): A elderly couple is found shot to death in their home.
American Ninja Warrior (8 p.m., NBC/Ch. 5): The St. Louis finals.
Hotel Hell (8 p.m., Fox/Ch. 13): In the Season 2 premiere, Gordon Ramsay tries to help a New Mexico hotel.
Seed (8 p.m., CW/Ch. 30): Harry advises Bill about how to be cool.
Murder In the First (8 and 10 p.m. TNT): A witness is killed.
Backpackers (8:30 p.m., CW/Ch. 30): The guys turn to Beth's brother for help.
Under the Dome (9 p.m., CBS/Ch. 2): Big Jim and Rebecca consider the extreme measure of population control.
Mistresses (9 p.m., ABC/Ch. 4): Savi says goodbye to her house.
Switched at Birth (9 p.m., ABC Family): John takes Bay and Daphne to Chicago on a college tour and a search for Bay's cousin.
The Fosters (10 p.m., ABC Family): There's a medical issue with Lena's pregnancy.
Longmire (11 p.m., A&E): A farmer is murdered.
Teen Wolf (11 p.m., MTV): Scott, Stiles and Kira play in their first lacrosse game.