Their enemy strands the searchers on a desert island.
The teams encounter a landslide and a viaduct.
The biochemist leaves clues for his rescuers.
Both teams have 30 hours to rescue a biochemist.
The exhausted teams head for their final rendezvous.
Tempers flare after 14 hours of draining activity.
Icy waters cause trouble in the mission's 10th hour.
Three hours into the mission, two people are captured.
Each team has five hours to complete its mission.
A British and U.S. team vie in a grueling challenge.