'Eureka,' 'Warehouse 13' and 'Haven' specials, 8PM, 9PM and 10PM ET, Syfy: Like the three Wise Men, this trio of Syfy shows come bearing gifts during the holiday season: Jim Parsons, Edward James Olmos, Chris Parnell and Matt Frewer are the guest voices on 'Eureka,' which finds the small-town scientists turned into animated versions of themselves; 'Warehouse 13' unveils its take on 'It's a Wonderful Life'; and on 'Haven,' holiday decorations start appearing in July, just as town residents begin disappearing.