Who remembers "To Serve Man"?

Richard Keil as the maneating alien on "To Serve Man"

Or "Nightmare at 20,000 Feet?" Or "Time Enough at Last"?

Fans of the old "Twilight Zone" series remember them as some of the best episodes ever of the Rod Sterling science-fiction series that ran for five years on CBS beginning in 1959.

On Monday, the Syfy network announced it will air a "Twilight Zone" marathon beginning at 8 a.m. Dec. 31 and continuing through New Year's Day.

Syfy also announced it will air its original movie "Christmas Icetastrophe" at 9 p.m. Dec. 20 about an asteroid strike that threatens to freeze the planet during the holidays.

At AMC, there will be marathons of the network's popular "Breaking Bad" beginning at 10 a.m. Dec. 28, followed by a marathon of "The Walking Dead" beginning 9 a.m. Dec. 30.

At the National Geographic Channel, it will be nostalgia for the new year. An 18-hour marathon of its "'80s: Decade That Made Us" and "'90s: Last Great Decade?" will air beginning at 9 a.m. Dec. 31. And to start the year with a bummer, National Geo will air a marathon of "Locked Up Abroad" beginning at 9 a.m. Jan. 1.