Alias: seasons 1-3 Region 1, season 4 Region 2
La Femme Nikita:
Spooks: season 3 Region 2
Smallville: season 5 Region 2
"Region" begins to look very very wrong if you type it that many times in a row.
eta: Region 2 DVDs will not play in the US unless you have an all-region DVD player, I'm afraid. However, you can get a key code for most DVD players to make them all-region for about ten bucks. Put your DVD player details into Google and ask for an all-region code and you should be able to find one.