A wild-haired inventor in a white coat throws up his hands beside a glowing gull-winged time-machine car in a crackling garage laboratory.

Original artwork, not a still

Dr. Emmett Brown

Great Scott!

— Back to the Future · 1985

Behind the line

What it means

Our interpretation.

It is the oath of a man who talks like a 1930s serial hero and builds a time machine out of a DeLorean, and it gives you Doc's whole character in two words: delighted, appalled, never swearing. Marty borrows it once in the trilogy, a role reversal fans spot with glee. It outlived the films as a ready-made reaction to any shock.

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In context

Spoilers for Back to the FutureShow the scene

Back to the Future (Robert Zemeckis, 1985) gives Doc Brown the same startled oath again and again. Its first appearance in Marty's 1955 adventure comes when Doc, watching the videotape of his 1985 self, hears that his time machine needs one point twenty-one gigawatts, repeats the figure twice, breathes the words and bolts out of the workshop. He says it again on learning Marty has already met his own parents, and a third time when lightning knocks the cable off the clock tower. Fans count fifteen uses across the trilogy.

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