From Comedy Central Press Release:
AN ALL NEW SOUTH PARK HALLOWEEN SPECIAL
PREMIERES ON FRIDAY, OCTOBER 26TH AT 10:00 P.M. ON COMEDY CENTRAL
NEW YORK, October 22, 2012 - Randy keeps Stan from trick or treating on an all-new episode of "South Park" titled "A Nightmare on Face Time," premiering Friday, October 26th at 10:00 p.m. on Comedy Central.
The boys are all ready to dress up as their favorite foursome, the Avengers, for Halloween. After months of planning their costumes, at the last minute Randy tells Stan he can't go trick or treating with his friends. Instead, Stan has to pitch in and help his father with a new business venture.
Preview clip: http://www.southparkstudios.co.uk/clips/qvij89/trick-or-treat
Credit to southparkstudios.com for the information.