One Million Years B.C. (ergo "that one with Raquel Welch") gets sequels?
there was one, titled "When Dinosaurs Ruled the Earth". It didn't star Welch, but it did have a former Playmate of the Year. It didn't have Harryhausen's special affects, it was Jim Danforth instead. It was entirely forgettable. I have it on a VCR tape...