
um, that really only tells half the story.
Primeval aired for 3 series on ITV 1, ITV in there wisdom then axed it.
Months later it was annouced that BBC WorldWide, had done a deal with ITV to save the show, meaning that it would conitnue to air on BBCAm, and now air on BBC WW Pay TV channel "Watch" as well as ITV, German channel Pro7 continues to co produce the show as it has from S1.
To say that Primeval has lasted 4 series, is only telling a very small part of the story.
Also Primeval was not just about dinosaurs, it featured other CGIs creatuers, and even predators from the future.