Saturday prime time

“Mercy” – Veronica and Mike, estranged since her affair became public, are reunited by a Flanagan family crisis; Sonia’s snobby high school rival becomes her patient. (Repeat) 8 p.m. on NBC.

“The Mentalist” – Patrick (Simon Baker) loses his sight in an explosion, forcing him to rely on his other senses to help him solve the murder of a financial adviser. (Repeat) 8 p.m. on CBS.

“Law & Order” – When a key witness in a murder trial is found dead in her hotel, detectives get involved in a spiraling case that unravels into an intricate conspiracy. (Repeat) 9 p.m. on NBC.

“America’s Most Wanted: America Fights Back” – John Walsh travels to eastern Europe to hunt down a drug lord who has led authorities on an international chase; new forensic technology gives authorities a powerful tool to help identify suspects. 9 p.m. on Fox.

“Law & Order: Special Victims Unit” – A case becomes much more complicated when racy photos of a 15-year-old rape victim are leaked on the Internet; Stabler’s son is drawn into a series of compromising events by his best friend. (Repeat) 10 p.m. on NBC.

“48 Hours Mystery” – A showgirl gets caught in a web of sex, lies, greed and murder. 10 p.m. on CBS.

Saturday late night

“Saturday Night Live” – Host Joseph Gordon-Levitt; the Dave Matthews Band performs. 11:29 p.m. on NBC.

Sunday prime time

“Brothers” – When Mike tries to spend a week in a wheelchair to win a bet he made with Chill, he makes some surprising discoveries. 7 p.m. on Fox.

“The Amazing Race 15” – Tempers flare when a team breaks a promise; a stolen taxi leads to a team falling to last place. 8 p.m. on CBS.

“2009 American Music Awards” – Fans votes determine which musical acts are honored at the annual ceremony at Nokia Theater in Los Angeles. 8 p.m. on ABC.

“The Simpsons” – Principal Skinner tells Bart that there is a former Springfield Elementary student hailed as the best prankster ever. 8 p.m. on Fox.

“NFL Football” – Philadelphia Eagles at Chicago Bears. Donovan McNabb and the Eagles take on the Bears, as both teams look to bounce back from two straight losses. 8:15 p.m. on NBC.

“The Cleveland Show” – Cleveland celebrates his first Thanksgiving with his new family and discovers a shocking secret about Donna’s Auntie Momma. 8:30 p.m. on Fox.

“Cold Case” – The team reopens the 1983 case of a teenager who was killed before he could get justice for his slain girlfriend. 9 p.m. on CBS.

“Family Guy” – Peter and the guys interview potential friends to fill the vacancy left by Cleveland. 9 p.m. on Fox.

“American Dad” – After attending a concert with Hayley, Stan becomes obsessed with her music. 9:30 p.m. on Fox.

“Three Rivers” – When a setback leaves a billionaire’s wife without a new liver, he resorts to buying one on the black market. 10 p.m. on CBS.