Z Nation (10 p.m., Syfy) – In the Season 2 premiere, everyone tries to escape the impending nuclear blast. Also, Citizen Z battles thawed zombies and issues an air bounty for Murphy.
Also on tonight . . .
Cold Justice (8 p.m., TNT) – The team travels to White Settlement, Texas, to investigate two different murder cases at the same time. The episode will be continued next week.
Redwood Kings (8 p.m., Animal Planet) – In the two-hour season finale, the crew, inspired by the work of Leonardo da Vinci, builds a gigantic medieval workshop for the biggest amusement trade show in the world, making this their most ambitious build ever.
Sign Up and Save
Get six months of free digital access to The News & Observer
Think It Up (8 p.m.) – In this special, airing on CBS, ABC, NBC and Fox, celebrities spotlight stories of teachers and students working together on projects.
9/11: The Miracle of Stairway B (8 p.m., History) – The History Channel airs several 9/11 specials today, including this special about 16 trapped survivors.