ONE SURVIVOR SUFFERS A MEDICAL EMERGENCY ON "SURVIVOR: PANAMA -- EXILE ISLAND," THURSDAY, APRIL 20

"Medical Emergency " -- One survivor suffers a medical emergency, on SURVIVOR: PANAMA -- EXILE ISLAND, Thursday, April 20 (8:00-9:00 PM, ET/PT) on the CBS Television Network.

When a medical emergency sends one survivor off the island for treatment, the others are left wondering whether or not the fallen castaway will recover and be able to return to the competition.

A brutally honest Reward Challenge, leaves one castaway particularly hurt by the outcome and another miffed that they weren't chosen to participate in the reward. Can the castaways get along after the challenge or are some tribe members too bitter to forgive and forget? As the lone member of the former La Mina tribe, Terry finds himself without any allies at camp. His only hope is that the constant bickering between the others will continue, although he still has the opportunity to use the Hidden Immunity Idol he found while on Exile Island (which some tribe members doubt he actually has). Tensions run high around camp when Shane questions the strength of his alliance and threatens to turn the game.

Will the tenth member of the tribe be voted out, or will the medical emergency force the ailing survivor to leave the game for good?

CASTAWAYS:
Dan Barry, 52, S. Hadley, Mass., Retired Astronaut (6th Voted Off)
Aras Baskauskas, 24 Santa Monica, Calif., Yoga Instructor
Austin Carty, 24, High Point, N. Carolina, Author (8th Voted Off)
Terry Deitz, 46, Simsbury, Conn., Airline Pilot/Retired Navy Fighter Pilot
Danielle DiLorenzo, 24, Pompano Beach, Fla. (originally from Boston), Medical Sales
Cirie Fields, 35, Walterboro, S. Carolina, Registered Nurse
Misty Giles, 24, Dallas, Engineer (3rd Voted Off)
Melinda Hyder, 32, Sevierville, Tenn., Singer (2nd Voted Off)
Bruce Kanegai, 58, Simi Valley, Calif., Karate Instructor/High School Art Teacher Courtney Marit, 31, Los Angeles, Performance Artist
Bobby Mason, 32, Los Angeles, Attorney (5th Voted Off)
Ruth Marie Milliman, 48, Greenville, S. Carolina, Director of Retail Leasing (4th Voted Off)
Shane Powers, 35, Los Angeles, Owner, Entertainment Marketing Company
Tina Scheer, 45, Hayward, Wisc., Logging Sports Performer/Promoter (1st Voted Off)
Sally Schumann, 27, Chicago, Social Worker (9th Voted Off)
Nick Stanbury, 25, Tempe, Ariz., Financial Sales (7th Voted Off)

SURVIVOR: PANAMA -- EXILE ISLAND is produced by SEG, Inc. Mark Burnett and Tom Shelly are the executive producers. Doug McCallie and Kevin Greene are co-executive producers.

For more detailed information on SURVIVOR: PANAMA -- EXILE ISLAND and the 16 new castaways, log on to www.cbs.com/survivor.

RATING: To Be Announced