WATCH: A Sneak peak of tonight's 'Survivor' Challenge

By
The castaways will once again be put to the test with this difficult challenge on tonight's "Survivor: Redemption Island"
As Challenge Producer John Kirhoffer explains, the object of the challenge is to stay hanging on as long as possible. Contestants are allowed to use their hands or legs to keep them from touching the water.
Find out who wins immunity when "Survivor" air tonight on CBS.