I bought on Amazon in UK the "Thin Blue Line" DVD series. I did not realise it had come from the States. Will it play in an ordinary UK DVD player? Before I open the cellophane is there something on the box which gives me a clue if it plays in Europe? Thanks.
Check the region code on the box
R1 is USA,R2 is Uk
It depends on whether your DVD Player is region free. Check it out in the instruction book or on the manufacturer's web site. If it is region 2 only then do a search on Google for resetting DVD region. There are several sites which list the various codes for lots of different models and it is usually just pressing specific buttons on the remote control.
Following on from what alanrwood said you need the code to make your player Region Free