Sid & Marty Krofft Pictures

Three years after being kicked out of the science department for his theory of Time warps, Rick Marshall is reduced to working as a teacher at the George C. Page Museum. He meets Holly Cantrell whose finding urges him to create a tachyon amplifier to enable time warp travel. Once they activate the amplifier, Rick, Holly and their cave tour guide Will Stanton end up in a parallel universe where all timelines converge. They soon meet some ape men and...