BBC publishes games for a vast number of its programs. Board games based on game shows are easy enough; they run into problems designing games for other types of shows. At that point, the only game they seem to know how to create is a variant on Top Trumps, which is a variant on the card game War.
Add to that a collectible card mechanic and we have an all around winner of a game. Of course, deadly animals are pretty cool.
I like this tvshows. Because I like the scary creatures and I like sharks and crocodile.