What to Watch on Wednesday: ‘Nature’ looks at animals surviving winter

Nature (8 p.m., UNC-TV) – A look at animals around the world who adapt and survive during winter, from the penguins of Antarctica to the bison of Yellowstone National Park.

Undercover Boss (8 p.m., CBS) – The CEO of Huntersville, N.C.-based AdvantaClean, a company specializing in services like water and mold damage, goes undercover.

Lethal Weapon (8 p.m., Fox) - Murtaugh and Riggs suspect that a misuse of power is at play in the death of a Texas Ranger.

Vikings (9 p.m., History) – The Viking army begins to gather in Kattegat, and Lagertha must remain vigilant in the absence of her son.

blackish (9:30 p.m., ABC) – Tensions are still running high at work for Dre, due to the outcome of the presidential election.

Wahlburgers (9:30 p.m., A&E) – In the Season 7 finale, Alma celebrates the holidays early when Mark and his children arrive.