The Impossibly Difficult Name that Movie Game

A scientist examining a substance in a vile.....is he a mad scientist?? Possibly. Possibly not. If you know the film this screenshot is from you would know how sane this man is.

As always, if you are not familiar with the rules to the Impossibly Difficult Name that Movie game or the prize, click here!

GAME OVER. 

Congratulations to Damsbo for correctly guessing this scene from the sci-fi/horror film "The Vampire" ( 1957 ).