Mary Stein

When Sal's Pizza burns down, Jake goes out of his way to disprove the fire marshal's assumption that the owner set the fire; a computer virus exposes the precinct members' Internet browser histories.

Blaine believes he has the best plan to win Nationals, but he doesn’t take the glee club’s criticism too well when the students accuse him of being too controlling. Over in New York, Kurt also runs into control issues when the band disagrees over the venue of their first official gig that Kurt booked. Meanwhile, Sue reveals the story behind her iconic tracksuit and gets in touch with her feminine side. Musical performances include "Into The Groove", “You’re My Best Friend”, “Nasty”, “Rhythm Nation”, “Cheek to Cheek”, and "The Fox".

The Enterprise crew travels between the 19th and 24th centuries in an attempt to prevent Data's death in 19th century San Francisco.

Al and Griff lose their jobs just before the holiday season; Bud and Kelly try to make some Christmas dollars.