When the entertainment for prom falls through, Principal Figgins asks New Directions to perform at the dance much to prom coordinator Sue’s dismay. Things get heated as the competition for prom king and queen draws closer, and Jessie St. James returns.
After a Navy SEAL imposter is set ablaze, NCIS obtains new information regarding the whereabouts of the stolen Brachytherapy canister that could be used to make a deadly bomb.
The trainers test the players to see what they've learned during their time at the ranch. The contestants have a chance to add to their scores by playing a "Biggest Loser" video game. Later, the players compete for an advantage at the weigh-in during a stair-building challenge utilizing weighted sandbags.
Lockhart/Gardner defends Stephanie Engler, the owner of an adultery Web site, after one of her users is murdered, but the civil case turns criminal when the murder is pinned on Stephanie. Alicia goes ballistic on Kalinda about her one-night stand with Peter, causing Kalinda to contemplate leaving the firm.
Part 1 of 4. The battle round kicks off with the coaches pitting two of their own team members against each other in a duet. Reba McEntire, Monica, Sia Furler and Adam Blackstone serve as advisers to the coaches.