Drain the Oceans

2 full episodes that National Geographic Channel posts free on National Geographic, its own YouTube channel, in the order their own titles number them. Each plays in YouTube's player, with YouTube's ads, loaded only when you press Play on its page.

Start with the first episode

Full episodes

  1. America's Last Slave Ship (Full Episode) | Drain the Oceans | National Geographic Full episode · Posted 2026 · 47 min Free with YouTube's ads, posted by National Geographic
  2. Unearthing Secrets of the Past (Full Episode) | Drain the Oceans | National Geographic Full episode · Posted 2026 · 44 min Free with YouTube's ads, posted by National Geographic

Compilations, marathons and "best of"

Each as its own title calls it. They gather several episodes or parts of them, so they are not numbered with the episodes.