Saturday prime time

“Betty White’s 90th Birthday: A Tribute to America’s Golden Girl” – A celebration of the actress’s birthday and career. (Repeat) 8 p.m. on NBC.

“NCIS: Los Angeles” – A Navy Intelligence commander is tracking the moves of a Venezuelan politician, then disappears. (Repeat) 8 p.m. on CBS.

“Cops” – Two intoxicated men vandalize a fence. 8 p.m. on Fox.

“Keeping Up Appearances” – Hyacinth and Richard visit the travel agent. 8 p.m. on WFWA, Channel 39.

“Cops” – A car flips over during a high-speed chase. 8:30 p.m. on Fox.

“Last of the Summer Wine” – Billy makes a promise that proves difficult to keep. 8:30 p.m. on WFWA, Channel 39.

“48 Hours Mystery” – Legal twists threaten to set a convicted killer free. 9 p.m. on CBS.

“Terra Nova” – Jim and Taylor team up against the Phoenix group. (Repeat) 9 p.m. on Fox.

“As Time Goes By” – Jean opens a second secretarial agency. 9 p.m. on WFWA, Channel 39.

“Betty White’s Off Their Rockers” – Senior citizens pull pranks on younger people. (Repeat) 9:30 p.m. on NBC.

“Law & Order: Special Victims Unit” – The squad makes a quick arrest when a student is raped. (Repeat) 10 p.m. on NBC.

“48 Hours Mystery” – A fight between a married couple ends in gunfire. 10 p.m. on CBS.

“Castle” – Detective Beckett struggles to survive. (Repeat) 10 p.m. on ABC.

Saturday late night

“Live From the Artists Den” – Ringo Starr and Ben Harper and Relentless7 perform with Joan Osborne. 11 p.m. on WFWA, Channel 39.

“Saturday Night Live” – Host Emma Stone; Coldplay performs. (Repeat) 11:29 p.m. on NBC.

Sunday prime time

“Undercover Boss” – Dina Dwyer-Owens, the chairperson and CEO of The Dwyer Group, goes under cover. 8 p.m. on CBS.

“Once Upon a Time” – David and Mary Margaret struggle with their feelings. 8 p.m. on ABC.

“Masterpiece Classic” – Downton becomes a convalescent home. 8 p.m. on WFWA, Channel 39.

“Prime Suspect” – Calderon and Duffy must inform a woman that her young granddaughter was raped and murdered. 9 p.m. on NBC.

“The Good Wife” – Alicia defends a student accused of murder. (Repeat) 9 p.m. on CBS.

“Desperate Housewives” – As Bree’s alcohol consumption increases, so does her lust for men. 9 p.m. on ABC.

“Masterpiece Classic” – Isobel and Cora disagree about Downton’s medical role. 9 p.m. on WFWA, Channel 39.

“Prime Suspect” – An incarcerated man could be responsible for a recent crime. 10 p.m. on NBC.

“CSI: Miami” – A tornado tears through a murder scene. (Repeat) 10 p.m. on CBS.

“American Idol” – Hopefuls perform in San Diego. 10 p.m. on Fox.

“Pan Am” – Kate learns how to be a pickpocket. 10:01 p.m. on ABC.