Syfy will close out 2012 with a holiday programming festival featuring an End of the World movie marathon - in case the Mayan apocalyptic prediction proves false - along with a Star Trek film extravaganza, the Doctor Who spinoff K-9 and, of course, the annual Twilight Zone New Year's Eve journey into the Fifth Dimension.

The holiday festivities kick off on Thursday, December 20 at 8 PM with the End of the World festival, concluding Friday, December 21 at 3 AM, highlighted by the Thursday night specials Countdown to Doomsday (12 AM) and 2012: Startling New Secrets (2 AM).

RELATED: Is Olly Alexander the New Doctor Who? Musician's Manager Responds to Wild Rumors

The continuing adventures of the Starship Enterprise journeys from 10:30 AM to 2 AM on Saturday, December 22, and 11 AM to 11:30 PM on Sunday, December 23.

Making its U.S. television premiere, K-9, a comedy/adventure series focusing on the adventures of the robot dog K-9 from the iconic series Doctor Who, blending computer animation and live action, airs on Christmas Day Tuesday, December 25 from 10 AM to 11 PM, with a marathon of all episodes in the series.

The Twilight Zone annual New Year's holiday marathon ushers in 2013 Monday, December 31 from 8 AM to 4:30 AM, and on Tuesday, January 1 from 6 AM to 5 AM.