Primeval, Series 1

Helen:
You have a serious creature incursion. A highly-evolved ambush predator. Intelligent, adaptable, and ruthless.

Claudia:
If there was a creature on the loose, we'd know about it!

Helen:
At least three people have gone missing in the last 48 hours.

Lester:
Missing.

Helen:
Killed. The creature has a lair nearby. It's taken them for food.

Nick:
And how do you know that?

Helen:
Because it almost got me too. [pause]

Nick:
What is it?

Helen:
It has no name.

Nick:
Then which era is it from?

Helen:
It doesn't come from any era... at least not one that can be identified yet.

Nick:
I'm sorry; I don't understand.

Helen:
Yes, you do, Nick. You knew it had to happen one day. You've known it ever since you first stepped into the past.

Nick:
...the future? Are you saying we're being attacked by a creature from the future?