Approved | | Horror, Sci-Fi, Thriller
A scientist becomes murderous after discovering, and being exposed to the radiation of, a powerful new element called Radium X.
Part of the original Shock Theater package of 52 Universal titles released to television in 1957, followed a year later with Son of Shock, which added 20 more features.
Opening Title Card:
FOREWARD: Every scientific fact accepted today once burned as a fantastic fire in the mind of someone called mad.
Opening Title Card: Who are we on the youngest and smallest of planets to say that the INVISIBLE RAY is impossible to science?
Opening Title Card: That which you are now to see ...
After Bela Lugosi takes an ultraviolet photo of the eyes of the deceased Sir Francis Stevens and turns out the bright light, Sir Francis is clearly seen blinking his eyes and moving fingers on his right hand again.
The character of "Professor Meiklejohn," correct in the opening credits, is listed as "Professor Mendelssohn" in the closing credits.