Saturday on TV
NFL preseason: Steelers at Redskins (5:30 p.m., NFL Net); Broncos at Seahawks (8:30 p.m., NFL Net)
Being Human (7 and 10 p.m., BBC America): Mitchell uncovers the vampires' secret plans.
Bill Engvall Show (7 and 10 p.m., TBS): Bill thinks that Danny is using his windfall to buy the family's love.
Beverly Hills Chihuahua (10 p.m., Starz): 2008 doggie comedy. (PG)
Sunday on TV
Sacred Stones, Living Stones (10 a.m., Ch. 5): Carole Mikita hosts this documentary celebrating the 100th anniversary of the Cathedral of the Madeleine.
MLS (4 p.m., digital Ch. 2.2): Real Salt Lake at New England Revolution
Who Wants to Be a Millionaire (7 p.m., Ch. 4): Regis Philbin hosts; Bill Nye (the science guy) is the lifeline expert.
Merlin (6 and 7 p.m., Ch. 5): A renegade sorcerer turns lead into gold; Merlin runs into a monster with the head of a serpent and the body of a lion.
Drop Dead Diva (7 and 9 p.m., Lifetime): Jane's client got sick after strictly following a diet plan.
There Goes the Neighborhood (8 p.m., Ch. 2): The families start forming alliances — just as you'd expect in this "Survivor" rip-off.
Shark Tank (8 p.m., Ch. 4): More entrepreneurs pitch their ideas to the sharks.
Miss Universe (8 p.m., Ch. 5): The ever-annoying Billy Bush and Claudia Jordan host this annual anachronism. (Taped)
Mad Men (8, 9 and 11 p.m., AMC): Betty's estranged father visits; the firm deals with an unusual request from a client.
Army Wives (8 and 10 p.m., Lifetime): Claudia Joy and Debra are in a car accident.
Defying Gravity (9 p.m., Ch. 4): The ship reaches the point of no return.
True Blood (10 p.m., HBO): Bill, Sookie and Jason return to Bon Temps.
Patton Oswalt: My Weakness is Strong (11 p.m., Comedy Central): The comedian performs.
Entourage (11 p.m., HBO): Vince and Turtle arm themselves.