Syfy is enlisting Judd Hirsch (Taxi), Paul Blackthorne (The Dresden Files), Chris Parnell (Saturday Night Live) and Matt Frewer to create stand-alone holiday episodes of Warehouse 13 and Eureka that will air in December.
On Warehouse 13, Pete and Myka will go on a mission to hunt down "a malevolent Santa Claus." Meanwhile, in time for Hanukkah, Artie and his estranged father, Isadore Weisfelt, reunite after 30 years. Hirsch will be appear as Artie's father, and Blackthorne will play a businessman terrorized by a thief dressed up as Saint Nick.
On Eureka, "as the Global Dynamics employees celebrate the season at the company holiday party, staff member Dr. Noah Drummer (Chris Parnell) nearly absconds with a volatile experiment. The halls get seriously decked when Dr. Drummer's unstable hydrogen crystal starts to grow at a frightening rate."
Frewer, who was an early regular on the series, will return as the character Taggert.