Great Scott! What a challenge.
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In case you thought they might be the same person, here’s a photo of Bernie Sanders and Christopher Lloyd, as Doc Brown, together. All the picture needs is Curb Your Enthusiasm’s Larry David to make a balding, silver-haired, gruff-voiced man trifecta.
Doc Brown, shown here in his leather side-shielded glasses, is hiding out four rows down and one Bernie in from the left.
The puzzle was created by Max Knoblauch.