NFL preseason (6 p.m., Fox/Ch. 13): Detroit Lions at Baltimore Ravens
Teachers Rock (7 p.m., CBS/Ch. 2): Carrie Underwood, Dierks Bentley, Fun, Josh Groban and Garth Brooks perform at this salute to American teachers.
Lost Girl (8 and 10 p.m., Syfy): Bo tangles with Fae.
Common Law (11 p.m., USA): Wes and Travis tell their full story to Dr. Ryan.
Saturday on TV ...
NFL preseason: New York Giants vs. New York Jets (5 p.m., NFL Network); Seattle Seahawks at Denver Broncos (7 p.m., Ch. 2.2); Dallas Cowboys at San Diego Chargers
Major League Soccer (7 p.m., Ch. 4): FC Dallas at Real Salt Lake
The Mormon Candidate (8 and 11 p.m., Current): This hourlong "investigation" of Mitt Romney's beliefs is paired with Becoming Barack (7 and 10 p.m., Current), which looks at the early years of President Obama's political career.
Sunday on TV ...
NFL preseason (6 p.m., NBC/Ch. 5): Indianapolis Colts at Pittsburgh Steelers
Big Brother (7 p.m., CBS/Ch. 2): The contestants who will face possible elimination are chosen.
Hell on Wheels (7 and 9:38 p.m., AMC): Durant confronts a threat.
Drop Dead Diva (7 ands 11 p.m., Lifetime): Grayson and Kim take a case involving a sperm donor.
Falling Skies (7 and 9 p.m., TNT): Tom discovers life-changing news; the 2nd Mass faces a dangerous threat. (Season finale)
Breaking Bad (8, 9:38 and 11:38 p.m., AMC): Walt, Jesse and Mike are worried about the future of their business.
Copper (8 p.m., BBC America): In the premiere of BBC America's first original series, set in early 1900s New York, Det. Kevin Corcoran investigates the murder of a young girl.
Army Wives (8 p.m., Lifetime): Kevin returns home.
Flip Men (8 p.m., Spike): Mike and Doug struggle to remove a foul stench from a house.
The Great Escape (8 and 11 p.m., TNT): The teams try to escape from a swamp.
True Blood (10 p.m., HBO): Bill - who's getting more and more annoying - slips into some sort of religious fervor. Wow, this season has just gone off the rails.
The Newsroom (11 p.m., HBO): The staff stages a mock debate.
Weeds (11 p.m., Showtime): Nancy struggles with a decision involving a questionable business.
Political Animals (11 p.m., USA): In the conclusion of this six-part series, Garcetti tries to get in the way of Elaine's plans to resign.
Episodes (11:30 p.m., Showtime): Merc's job is in danger; Matt hooks up with his stalker.