icon-close icon-dropdown-arrow icon-edit icon-google-play icon-ios icon-key icon-live-tv icon-my-videos icon-navigation-arrow icon-preview-with-circle icon-preview icon-search icon-showinfo icon-showlistings-player icon-watchlist-add Layer 1 icon-watchlist-remove

SIGN IN WITH YOUR TV PROVIDER

You’re just a few clicks away from the show you want to watch. Please sign in with your TV provider to watch this episode and other great programs.
Now Playing
Sci Fi Science

Deep Impact

Season 2 Episode 3
90% of the rocks in space are big enough to destroy civilization. And it's not a question of if they'll hit - it's a question of when. Dr Michio Kaku is on a mission to save planet Earth.
  • 22 min
  • TV-G
  • Premiered 09/08/2010