What to Watch Sunday: ‘The Great Pumpkin, Charlie Brown’ on TV, Diana doc continues

It’s the Great Pumpkin, Charlie Brown (7:30 p.m., PBS NC/Rootle) - This timeless classic is back on “regular TV” again, after being available only on streaming last year (Apple TV+ previously purchased the rights to the Peanuts properties). In the beloved special, Charlie Brown preps for a party, while Snoopy sets his sights on the Red Baron and Linus patiently awaits a pumpkin patch miracle. This airs on PBS and on PBS Kids, and also streams on Apple TV+.

The Santa Stakeout (8 p.m., Hallmark) - In this new Hallmark Christmas movie, two police detectives posing as newlyweds to solve recent holiday party heists are swept up by Christmas while observing the prime suspect.

Diana (9 p.m., CNN) - Tonight we get Part 3 of the new six-part documentary series re-examining the life of Diana Spencer. The series tells Diana’s story through the lens of modernity: reframing her story to discover the real woman behind the “People’s Princess.” It draws on a new generation of voices, including interviews from those close to her, for a fresh take that reveals a princess unlike any other. In tonight’s episode, Princess Diana takes the world by storm on her first international tour and “Di-Mania” is born. But her increasing popularity creates tensions and jealousy between her and husband Prince Charles. NOTE: CNN Audio is also exploring the life of Princess Diana in a new podcast titled “When Diana Met…” hosted by Aminatou Sow. The podcast takes listeners inside Diana’s most notable meetings with public figures, politicians, dignitaries and celebrities to reveal often-overlooked truths and misunderstandings about her life as Princess of Wales.

Outrageous Pumpkins (10 p.m., Food Network) - In the finale, the remaining four carvers are challenged to create a doomsday hero and then incorporate that character into a 5-foot-tall scene depicting the end of the world and featuring world-famous Atlantic giant pumpkins.

Some programming descriptions are provided by networks.