Who said "The flux capacitor works! It actually works!"?

This quote is attributed to Dr. Emmett Brown.

The flux capacitor works! It actually works! - Dr. Emmett Brown

"The flux capacitor works! It actually works!"

Dr. Emmett Brown

"Great Scott!"

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull?"

"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."