Anyone who watches the revived series of Doctor Who knows what 'fixed points' are. They are events or people that are just meant to be and if you try to change them, time goes haywire. There wasn't really any mention of anything like this in Primeval; the timeline seemed to be very easily changed but what if there was? What if both Claudia Brown/Jenny Lewis and the Future Predators were fixed points but slightly different from the Doctor Who types? Both Claudia and Jenny seemed to possess some sort of foresight, vague though it may have been and it seems a little coincidental that when the timeline changed that the new version of Claudia Brown still ended up working with the anomalies.
And then there's the Future Predators. No matter how much the timeline changed, they always seemed to be around in one shape or form. They just seem to be 'meant to be'.
What do you think?