Plot: The contestants assume the role of either teacher or student; a challenge grants immunity to the winning team; a contestant threatens to quit the competition.
Cast
Bob HarperTrainerBob Harper was 44 in The Biggest Loser - Season 9 - Week 3 (Episode 3).
Birthday: Wed, Aug 18 1965
Alison SweeneyHostAlison Sweeney was 33 in The Biggest Loser - Season 9 - Week 3 (Episode 3).
Birthday: Sun, Sep 19 1976
Jillian MichaelsTrainerJillian Michaels was 35 in The Biggest Loser - Season 9 - Week 3 (Episode 3).
Birthday: Mon, Feb 18 1974