The Green Slime (1969) – theme song by Richard Delvy Open the door you'll find the secret To find the answer is to keep it You'll believe it when you find Something screaming 'cross your mind Green Slime What can it be, what is the reason Is this the end of all that breathes, and Is it something in your head? Will you believe it when you're dead? Green Slime, Green Slime, Green Slime What can it be, what is the reason Is this the end to all that we've done? Is it something in your head? Will you