Saturday prime time

“Kings” – King Silas sends David on a mission to recover a national treasure; Jack and Katrina’s engagement gets attention. 8 p.m. on NBC.

“48 Hours Mystery” – An obsessed cop uses forensics to solve the murder of a beautiful young woman that haunted a town. 8 p.m. on CBS.

“Wipeout” – Contestants tackle obstacles such as Shish Kabob, Zig Zag Buoy Run and Sack Launch. (Repeat) 8 p.m. on ABC.

“Macy’s 4th of July Fireworks Spectacular” – Fireworks explode over New York; appearances by Rob Thomas and Jewel. 9 p.m. on NBC.

“Harper’s Island” – Seven years after her mother and five others were murdered on Harper’s Island, Abby Mills returns for the wedding of her best friend, but a week of celebration turns to a fight for survival. (Repeat) 9 p.m. on CBS.

“Boston Pops Fireworks Spectacular” – Neil Diamond performs some of his classic hits with the Boston Pops Esplanade Orchestra, conducted by Keith Lockhart; fireworks explode over the Charles River. 10 p.m. on CBS.

Saturday late night

“MADtv” – Johnny Gan and his sidekick, Pongo, play “Deal or No Deal.” (Repeat) 11 p.m. on FOX.

“Saturday Night Live” – Host Tim McGraw; Ludacris and T-Pain perform. (Repeat) 11:29 p.m. on NBC.

Sunday prime time

“Merlin” – A magical winged creature attacks Merlin; Lancelot tells Merlin about his dream of becoming a knight of Camelot. 8 p.m. on NBC.

“Extreme Makeover: Home Edition” – The team makes over the home of a disabled combat veteran who continues to lobby on behalf of his fellow servicemen; during the renovation, the family travels to Washington, D.C. (Repeat) 8 p.m. on ABC.

“King of the Hill” – Hank receives a box of his late father’s personal effects and a set of bizarre last requests. (Repeat) 8:30 p.m. on Fox.

“The Bourne Supremacy” – (2004) Matt Damon, Franka Potente. A CIA chief sends a senior operative to take down Jason Bourne when it appears the rogue agent is behind the deaths of two people. 9 p.m. on NBC.

“Desperate Housewives” – Susan (Teri Hatcher) and Edie accidentally lock themselves in a basement; the search for Porter leads Lynette to her mother; Dave gets closer to exacting revenge. (Repeat) 9 p.m. on ABC.

“Family Guy” – A psychic reveals that Peter had a past life in the 17th century as Griffin Peterson. (Repeat) 9 p.m. on Fox.

“The Simpsons” – Homer thinks Bart’s new friend is orchestrating a terrorist plot. (Repeat) 9:30 p.m. on 55.

“Without a Trace” – The team finds plenty of suspects when a high-end Russian matchmaker disappears. (Repeat) 10 p.m. on CBS.

“Brothers & Sisters” – Despite a life-threatening medical crisis and the birth of his son, Robert remains determined to run for governor. (Repeat) 10:01 p.m. on ABC.