Walking with Dinosaurs/Tear Jerker


 * The death of the Giant Flyer Ornithocheirus in Giant of the Skies and the eventual extinction of the dinosaurs. But "Giant of the Skies" especially. Not to mention the poor young cynodonts from the first episode...
 * Just the music itself in Giant of the Skies is heartbreaking enough.
 * The Walking with Dinosaurs Special about Big Al : Many people felt sad when.
 * The poor old Liopleurodon  in Walking with Dinosaurs. This series is not kind to it's older characters.
 * Walking With Beasts has also a sad scene when a young Indricotherium is violently driven off by its own mother as she got a new calf. The scene when the Gastornis chick is eaten alive by ants is an odd mixture of this and Nightmare Fuel, just like the aforementioned cynodonts. Still another example from Beasts is the opening with the australopithecines "mourning" their elder female in "Next of Kin", probably because of how human they look.
 * Also in Walking With Beasts, the mother bear dog
 * The entire Late Permian in Monsters is a slow journey to death for all creatures, since the infamous Permian/Triassic extinction is going to take place soon. And that was the worst mass extinction ever, the Cretaceous one coming only in second or third place : 90 % of marine and 70-80 % of terrestrial lifeforms went extinct.
 * In a meta sense, the eventual removal of the highly addicting Evolution Game (which accompanied Walking with Beasts) and later the Big Al game (which accompanied The Ballad of Big Al) from the franchise's website. Especially the latter, considering that it had been there for more than ten years. To make things worse, neither of these removals were announced beforehand, and a former major policy of the BBC website is to only remove content that is so dated it could potentially cause harm.