Another journey into the realm of the strange and terrifying.

I hope you will enjoy the trip that it will thrill you a little and chill you a little.

So settle back.

Get a good grip on your nerves.

Where are we going?

You'll find out when we get there.

The CBS Radio Mystery Theater presents.

The CBS Radio Mystery Theater presents.

Come in.

Welcome. I'm E.G. Marshall. I'd invite you to sit down, but at the moment we're in a laboratory, the laboratory of Dr. John Gilbert and Stephen Kaplan. Two research scientists at State University. Nothing but sinks and test tubes and Bunsenburners and only one chair at a desk where Dr. Gilbert is now sitting alone, talking into a small tape recorder.

I think without disturbing him, we might just listen.

Tape 26.

4 p.m. Friday, February 17.

Tomorrow, we will make the supreme test.

The serum I-23 has already been effective on mice and rabbits.

Tomorrow, if it works on the human body,

there's no end to the potential.

I have no qualms at all.

The serum won't kill me.

At least, I don't think so.

But we cannot know its true worth until we try it on a human.

On me.

...