I'm a huge fan of Karel Zeman's films so it's hard for me to say which one I think is best, although I have a real weakness for BARON PRASIL and JOURNEY TO THE BEGINNING OF TIME. I finally got to see this and it has good characters and it seems to anticipate the kind of comedy that Monte Python would later end up doing. Based on Verne's story, it involves factions fighting one another who end up on a comet joining forces to survive. As someone else said, the comet looks enough like Earth that if they didn't tell you they were on a comet and the comet didn't have dinosaurs, you'd think they were still back on Earth. When the dinosaurs finally show up, they come in herds and they look pretty good. It's some fine stop-motion animation but it seems kind of tacked on. Photography and music score as usual are top drawer and even the characters are likable if somewhat silly. Overall, there is just no tension or suspense. It's a comedy pretty much so you never really believe anyone is in danger. The animation is excellent as it always is in Zeman's films but this is definitely not his best work. I still think his best work is BARON PRASIL.