Glee Goes Gruesome for 'Thriller'

Costumed and covered in gruesome zombie makeup, the Glee cast is hardly recognizable as they gnash their teeth and perform a jerky dance across a football field for the big February 6th post-Super Bowl extravaganza.

Joined by sexy blue-haired cheerleaders, the group will take on the Michael Jackson's classic "Thriller" video as a mashup with the Yeah Yeah Yeahs's "Heads Will Roll."

The episode, at between $3 and $5 million the most expensive to date, will focus on the growing tension between the Glee club and the football team.

"You can never re-create something as incredible as 'Thriller,' " Lea Michele tells Entertainment Weekly. "We're making it our own."