2x1cutter+stephenTalkInCretaceous "What if this world is the only one there is?"
This article is written from the real world point of view (not from the Primeval Universe).

The Impossible Pictures frame gag is a gag that appears at the very end of each episode of Primeval of Series 1 and Series 2.  It featured the Impossible Pictures logo with the "creature of the week" image inside the picture frame being held in front of the person's face. From Series 3 onwards, the gag was dropped with only the logo being shown each week.

Frame gags

Series 1

Series 2

Series 3, Series 4 and Series 5