Bernadette and Howard attempt to leave the kids at home on The Big Bang Theory finale. "The Stockholm Syndrome" is the 24th episode of the show's 12th season.
Sheldon: The only drug I need is the endorphins pumping through my brain in anticipation of our victory. Amy: Well, technically, anticipation wouldn't be mediated by endorphins as much as dopamine but, y'know, you've been up all night so I'll give you that one.
