TV Drain the Oceans - Season 4 Episode 2 : The Battle for the Black Swan Drain the Oceans - Season 4 Episode 2 : The Battle for the Black Swan 7/10 by 27 users Archaeologists and treasure hunters battle it out over half a billion dollars worth of gold and silver. Who will win the Battle for the Black Swan? Details Casts Posters Images Title Drain the Oceans - Season 4 Episode 2 : The Battle for the Black Swan Alternative Titles Drain the Ocean: See What Lies Beneath Our Seas, Enthüllt: Geheimnisse der Meere, Drenar los océanos, Les secrets engloutis, Lecsapolt óceán, 海底大探索, Izsušitev morja First Air Date 2018-05-28 Last Air Date 2023-04-09 Number of Episodes 55 Number of Seasons 6 Genres Documentary, Networks National Geographic, Casts Craig Sechler Plot Keywords , Self - Narrator (voice) Craig Sechler Episodes List Drain the Oceans Season 4 :Episode 1 The Wild West The Wild West 2021-08-02 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 2 The Battle for the Black Swan The Battle for the Black Swan 2021-08-02 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 3 Hollywood Hollywood 2021-08-09 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 4 The First Americans The First Americans 2021-08-09 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 5 Venice's Lost Empire Venice's Lost Empire 2021-08-09 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 6 Hurricane Apocalypse Hurricane Apocalypse 2021-08-17 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 7 The Great Barrier Reef The Great Barrier Reef 2021-08-23 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,... Drain the Oceans Season 4 :Episode 8 Sea of Secrets Sea of Secrets 2021-08-23 Maritime mysteries—old and new—come to life in this series, combining scientific data and digital re-creations to reveal shipwrecks,...