Crackpot professor Lionel Jeffries leads an 1899 expedition in an entertaining 1964 children’s fantasy based on an H.G. Wells novel. The idea of a Victorian outer space is charming, even if the British humor is overplayed. Animator Ray Harryhausen contributes a few memorable effects, including a giant stop-motion caterpillar. With Edward Judd, Martha Hyer, and an uncredited Peter Finch; former art director Nathan Juran (who designed the Welsh village in John Ford’s How Green Was My Valley) directed.