“Christmas Caper” (8 p.m., ABC Family): Starring Shannen Doherty clad in the snug

“Christmas Caper” (8 p.m., ABC Family): Starring Shannen Doherty clad in the snug leather outfit of a jewel thief, “Christmas Caper” is an engaging bit of fluff about a notorious outlaw whose heart really isn’t as hard as the diamonds she steals. Redemption begins when a New York heist goes awry and Cate (Doherty) needs a place to lay low. She returns to her hometown to look after her niece and nephew while their parents are stranded on a vacation trip. It’s just a few days until Christmas (a season Cate used to scorn) and the local sheriff is Cate’s high school sweetheart (who she tells herself she no longer cares about). Can Cate atone for her past without destroying the good things in life she’s rediscovered?

“Prison Nation” (8 p.m., National Geographic Channel): For the first time in the nation’s history, more than 2 million Americans are living behind bars. National Geographic Channel explores this in a new documentary, “Prison Nation,” which finds seasoned criminals running gambling and drug rackets on the inside, first-timers learning rules about getting along, and female inmates proving they can be as brutal as the men. The special declares that, nationally, the prison population has increased 1,000 percent in the past 30 years, with half of state prisons filled beyond capacity. Some 70,000 inmates are released from prison each year, and more than two-thirds end up back behind bars within three years.

“The Simpsons” (8 p.m., Fox): The cast of “Frasier” has a mini-reunion when Sideshow Bob (Kelsey Grammer) shows up with his brother (David Hyde Pierce) and his dad (John Mahoney).