zero-days2If you’re not feeling low enough from the political state of the world, consider the world of cyber warfare, which has already had an outsized effect on the election. Alex Gibney’s documentary “Zero Days” (Showtime, 9 p.m.) looks at the emergence of Stuxnet a self-replicating computer virus discovered in 2010 that was supposedly created to meddle with Iran’s nuclear program. Said to be 20 times more complex than any former virus, the malware has the power to infect and destroy infrastructures. The filmmaker ramps up the paranoia accordingly.

You might have had enough of the child murder case they dredged up earlier in the season for a handful of new documentary specials. But now comes the TV movie version “Who Killed Jon Benet?” (Lifetime, 8 p.m.), narrated by the actress who plays the victim, Payton Lepinski. Michel gill and Julia Campbell play the parents. It apparently draws no conclusions but it is followed by its own additional two hour documentary, posing the question “JonBenet’s Mother: Victim or Killer?” (Lifetime, 10 p.m.).

Sports dominate prime time networks mostly with college football: Alabama at LSU (CBS, 8 p.m.) and Nebraska at Ohio State (ABC, 8 p.m.) — but also horse racing’s Breeders’ Cup (NBC, 8 p.m.) from Santa Anita Park.

The preseason holiday fare continues on Hallmark with “The Mistletoe Promise” (Hallmark, 8 p.m.) in which Jamie King and Luke Macfarlane star as strangers who at first unite in their distain of the holiday but warm to it and each other.

It’s Rebel Wilson night on premium cable as both “How to Be Single” (HBO, 8 p.m.) with Dakota Johnson and “The Brothers Grimsby” (Starz, 9 p.m.) with Sacha Baron Cohen make their premium cable debut.

A British import looks into the life and death of the pop star with “Karen Carpenter: Goodbye to Love” (Reelz, 9 p.m.).

Oceanic food of France is sampled on “The Mind of a Chef” (PBS, 9 p.m., check local listings).

A big clue is found on “Dirk Gently’s Holistic Detective Agency” (BBC America, 9 p.m.).

On the first season finale of “Life at Vet U” (Animal Planet, 10 p.m.), graduation is imminent.

Eddie Redmayne, Bryan Cranston and Leann Rimes are on a new “Graham Norton Show” (BBC America, 10 p.m.).

“Oprah: Where Are They Now?” (OWN, 10 p.m.) checks up on Jamie Lynn Sigler, Kim Fields, Rocco Dispirito and wrestler David Otungo.

Sissy Spacek is featured on Turner Classic Movies tonight, but not with “Carrie.” Instead: “Coal Miner’s Daughter” (8 p.m.), the great “Badlands” (10:15 p.m.) and “Marie: A True Story” (midnight).

Later comes two horror movies from the 1980s, “Alone in the Dark” (TCM, 2 a.m.) and “He Knows You’re Alone” (TCM, 3:45 a.m.).

Today’s college football starts with Navy vs. Notre Dame (CBS, 11:30 a.m.) and continues at noon with: Louisville at Boston College (ESPN2), Wisconsin at Northwestern (ABC), Vanderbilt at Auburn (ESPN), Air Force at Army (CBS Sports), Texas at Texas Tech (Fox Sports 1), Michigan State at Illinois (ESPNews) and Georgia Southern at Mississippi (ESPNU).

Games at 3:30 p.m. include: Maryland at Michigan (ESPN), Virginia Tech at Duke (ESPNU), Syracuse at Clemson (AB), Florida at Arkansas (CBS), TCU at Baylor (Fox), Oklahoma State at Kansas State (ESPN2), Oregon State at Stanford (Fox Sports 1) and BYU at Cincinnati (CBS Sports).

Later games include Memphis at SMU (ESPNews, 4 p.m.), Kansas at West Virginia (ESPN2, 7 p.m.), Florida State at North Carolina State (ESPNU, 7 p.m.), Oregon at Southern Cal (ESPN, 7 p.m.), Hawaii at San Diego State (CBS Sports, 7 p.m.), East Carolina at Tulsa (ESPNews, 8 p.m.), Utah State at Wyoming (ESPN2, 10:15 p.m.), Nevada at New Mexico (ESPNU, 10:15 p.m.) and Washington at California (ESPN, 10:30 p.m.).

Basketball includes Clippers at San Antonio (NBA, 8:30 p.m.).

Hockey has Rangers at Boston (NHL, 7 p.m.).

Mexican singer Natalia Lafourcade and Latin funk orchestra Grupo Fantasma play a new “Austin City Limits” (PBS, 11 p.m., check local listings).

Benedict Cumberbatch hosts a new “Saturday Night Live” (NBC, 11:30 p.m.). Solange is musical guest.