Discovery Channel HD

Marine biologist Danni Washington and conservationist Paul de Gelder track deadly tiger sharks in one of Brazil's most beautiful tourist destinations.

'Alaska: The Last Frontier Season Specials. S6/E4 - Like Father, Like Son'. The Kilcher men share the importance of communication between fathers and sons, especially in the face of danger. Plus, Eiven shares his hope for Findlay.

'S7/E5 - Episode 5'. Parker discovers a potential $1.5 billion payday in Serra Pelada, but first, he needs to strike a deal with the local owners.

'S11/E27 - The Wolf Of Wall Streak'. Chris McCully and crew hit a paystreak so lucrative they call it 'Wall Street.' Shawn strikes gold at 40 feet under the ice. Vernon's diver faces a disaster.

'S1/E1 - Episode 1'. Mickey Grosman leads amateur explorers deep into the Amazon on a death-defying quest across the South American continent. Will they make it out alive?

'S7/E5 - The Devil's Woods'. The frigid Montana wilderness pushes the survivalists to breaking point. As they struggle to work together, bears and aggressive moose circle their camp.