The writing was terrible. There was WiFi in 10,000 BC and computers everywhere. Also, in 10,000 BC, they always had clean clothes and an abundance of it and gas for their cars. There was no antibiotics in 1964 yet they had tar removal in 10,000BC. The 2 main characters were teenagers in 64 which makes no sense because they have young teenage children in 2021 and they are suppose to be in their 40s. The doctor shot a prehistoric alligator with an M16 yet a whole army with semi automatic weapons couldn't take down one TRex. This was j6st bad tv