Robby the Robot is credited as 'Himself', even though he is supposed to be another alien robot; is wearing a different head and is never referred to as Robby.
Filmed on location at the center of the Earth
Coming Soon: Phantom Empire II "The Land Where Time Said Fuck It!"
For your listening pleasure this motion picture was recorded in prehistoric STEREO.
[pre-credits] These are the real people who lived this great Adventure and this is EXACTLY the way it really happened... Just as they told it to me. [pause] I really mean this. (a) Fred Olen Ray
Opening scroll: "The story you are about to see is TRUE. Nothing has been changed. These are the real people who lived this great Adventure and this is EXACTLY the way it really happened. . . . Just as they told it to me. I really mean this. [signed] Fred Olen Ray