How I Met Your Mother

Season 4 Episode 4

Intervention

Aired Monday 8:00 PM Oct 13, 2008 on CBS

Trivia

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  • Quotes

    • "Old" Barney: In a few minutes, the young me from your time is going to come through that door. Now, Cindy, I know this sounds insane, but in order to save the planet, you need to sleep with him tonight.
      Cindy: What? I...
      "Old" Barney: Sleep with Barney Stinson tonight, in whatever way he wants it, or he won't be able to find the solution to global warming that saves the human race.