← Mysteries of the Deep The Best of UnderSea ExplorerSeason 139 episodes · 20111Sea of Steelfinale01 Nov 2011 · 23 min2Treasure Hunters08 Nov 2011 · 21 min3Galapagos15 Nov 2011 · 23 min4Giants of Socorro22 Nov 2011 · 23 min5The Coral Reef29 Nov 2011 · 23 min6Dolphins06 Dec 2011 · 23 min7The Caves of Akumal13 Dec 2011 · 23 min8The Gales of November20 Dec 2011 · 23 min9Ocean of Fire27 Dec 2011 · 23 min10Whales03 Jan 2012 · 23 min11Sulawesi Sea/Borneo10 Jan 2012 · 23 min12Shark Frenzy17 Jan 2012 · 23 min13New Guinea24 Jan 2012 · 23 min14Fiji31 Jan 2012 · 23 min15The Emerald Sea07 Feb 2012 · 23 min16The Great Barrier Reef14 Feb 2012 · 23 min17Ghost Fleet of the Pacific21 Feb 2012 · 23 min18Oasis of the Deep28 Feb 2012 · 23 minNo image19Sea of Cortez06 Mar 2012 · 23 min20Free Diving13 Mar 2012 · 23 min21The Graveyard Coast20 Mar 2012 · 23 minNo image22Shark Island27 Mar 2012 · 23 minNo image23Bonaire03 Apr 2012 · 23 minNo image24Great White10 Apr 2012 · 23 minNo image25The Florida Keys17 Apr 2012 · 23 min26Shark Encounters24 Apr 2012 · 23 min27Lagoon of Lost Ships01 May 2012 · 23 min28Cocos Island08 May 2012 · 23 min29The Kelp Forest15 May 2012 · 23 min30Manatees22 May 2012 · 23 min31Sea Turtles29 May 2012 · 23 min32Palau05 Jun 2012 · 23 min33The Red Sea12 Jun 2012 · 23 min34Tentacles19 Jun 2012 · 23 min35Seals & Sea Lions26 Jun 2012 · 23 min36Bermuda-Isle of Devils03 Jul 2012 · 23 min37Tek Wrecks10 Jul 2012 · 23 min38The Yongala17 Jul 2012 · 23 min39The Cayman Challenge24 Jul 2012 · 23 min