The scene opens on the exterior of Henry's watchtower. There's a big old scary horror film storm brewing.
Switch to a very dramatic interior shot of the darkened watchtower, with Henry moving about amidst his equipment. Again, it's filmed from a fixed position with Henry moving around in the distance, as if on a stage set.
He orders Fritz about; do this, do that, get ready for some scary unspecified experiment that will make you shake in your boots.
Henry is relying on the storm for electricity, he says.
There's a corpse on a table in the center of the equipment; Henry pulls a sheet off its face to show that it's bandaged tightly about the head.
Henry says the brain Fritz stole is inside the body.
They do a test of the equipment, giving the film a chance to throw in some dramatic sparking special effect lights. (They still look pretty nifty, even today.)
The sparks stop sparking, and then there's a knock on the door.
Henry tells Fritz to send whoever it is away.
Fritz limps through the castle, in and out of shadows.
He opens the door and it's Dr. Waldman, Elizabeth, and Victor, but Fritz won't open up.
Henry looks down from a high window, and hears that it's Elizabeth .
So he troops downstairs, and finally lets them in.
But he's not happy about it.
He tries to get them to leave, but Victor says the magic words, "You're crazy."
All mad scientists react to those words by getting crazier, and Henry is no exception.
He takes it as a dare, and decides to show them his experiment.
So up they go to the lab.
Henry makes Victor and Elizabeth sit down. Waldman's about to uncover the body, but Fritz yells at him, and Henry stops him.
Henry then says he's discovered a super ray that's the basis of all life.
Dr. Waldman says essentially, "Sure, buddy, whatever."
Henry tells him that he's going to bring a monster to life just to prove it.
He also says the body is stitched together from other dead bodies. Everybody seems to think that's kind of gross.
Then he starts up all the special effects machinery again. Henry and Fritz uncover the body.
Why make a super strong large body? Why not make a small, easily handled body that can't hurt anyone?
Oh, well, too late now. In the most famous scene of the film, probably, the table with the body rises up through the darkness towards an open rectangular skylight.
Lights flash, thunder rolls, actors react with expressions of horror and fascination.
This goes on for a bit.
Then the table descends.
There's a close up of the monster's hand, which is moving. Henry does the famous cackling, shouting, "It's alive!" and comparing himself to God.
The others try to restrain him lest his overacting cause a chain reaction and destroy them all.