they didn't Olly - this is one part of the US version that departs from the original Danish version.  I'm not sure if the US version added this for effect or because rather than do their version over one series, it's been dragged out over two.

Personally the first series followed the original fairly closely but the decision to drag it out over two meant they went off on a different tangent and I feel this is why they lost loads of viewers and why it's been cancelled 

I thought I had posted in here?  How strange! 

Well, what I said was maybe in the Danish version they went to Greenland.

I'm probably way off though. 

They did go to Greenland but that was the second series not the first.  Although maybe the US version borrowed that bit from the second series???  Who knows 

Go Lizzie!!!! 

I should get into writing screenplays.

oops I forgot to check back. .thanks guys

They cancelled it!!!???

bleedin USA cancel all the bluddy good stuff. .am getting sick of liking a series and getting really into it  only to find the execs cancel cos it's probably too cerebral or summat so doesn't get the viewing figures... .grrrrrrrrrrrrrrr