"I Promise..." - Desperate for friends and allies, one castaway sacrifices immunity in order to stay in the game. Meanwhile, another castaway has made promises to too many friends, forcing an alliance betrayal at Tribal Council, on SURVIVOR: MICRONESIA - Fans vs. Favorites, Thursday, April 17 (8:00-9:00 PM ET/PT) on the CBS Television Network.

CASTAWAYS:

FANS:  Joel Anderson (5th Voted Out), Natalie Bolton, Michael "Mikey B" Bortone (4th Voted Out), Tracy Hughes-Wolf (7th Voted Out), Alexis Jones, Erik Reichenbach, Mary Sartain (2nd Voted Out), Jason Siska, Kathleen Sleckman (Quits Game), Chet Welch (6th Voted Out)

FAVORITES:  Yau-Man Chan (3rd Voted Out), James Clement, Ami Cusack (8th Voted Out), Jonny Fairplay (1st Voted Out), Cirie Fields, Amanda Kimmel, Oscar "Ozzy" Lusth, Eliza Orlins (9th Voted Out), Jonathan Penner (Medical Evacuation), Parvati Shallow

SURVIVOR: MICRONESIA - FANS VS. FAVORITES is hosted by Jeff Probst and produced by SEG, Inc.  Mark Burnett is the executive producer.  Doug McCallie, Kevin Greene and Teri Kennedy are co-executive producers.

 For more detailed information on SURVIVOR: MICRONESIA - FANS VS. FAVORITES and the 20 castaways, log on to www.cbs.com/survivor.