She was asking too many questions, and no one should know too much about their future.
— Dr. Emmett Brown (Christopher Lloyd)
4 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 00:05:37.464 in the Blu-ray version of the movie.
Quote context
[...]
- Doc, now, you said we were married, right? Yeah? Was it a big wedding?
- Marty, we're gonna be able to see our wedding.
- Wow.
- I'm gonna be able to see my wedding dress.
- Wow.
- Doc! What the hell are you doing?
- Relax, Marty. It's just a sleep-inducing alpha rhythm generator.
- She was asking too many questions, and no one should know too much about their future.
- This way, when she wakes up, she'll think it was all a dream.
- Then what did you bring her for?
- Don't worry. She's not essential to my plan.
[...]