Strong currents, sharks, and unpredictable weather all threaten to defeat Stephen Redmond as he sets out to become the first long distance swimmer to complete the Ocean's Seven. Two brothers attempt to free-climb Mt. Asgard. Laila Ali hosts.

Every month, an enormous tidal wave, known as "Big Thunder," tears through the lower Amazon devastating the shoreline and carrying off everything in its path. It's the perfect challenge for a group of big wave surfers who want to test their limits. Laila Ali hosts.