Waling with Dinosaurs may be the most fondly remembered of the series, but I'd place this as the best of the Walking With series. Talking the lessons learned from the prior series, the filmmakers seek to push the limits by giving the audience what is quite literally a more in-depth look at the fascinating life before the dinosaurs. It may be shorter than the others, and inevitably suffers from some inaccuracies, but it's nonetheless an engaging and thrilling experience.
Review of Walking with Monsters
