Do you know the name of the channel 4 series

[mathewhopper]

The series was about a town that had some weird alien stuff going on and people were cloned then the real ones were killed and replaced with aliens who looked ike thet could breath under water.

thanks

[cameo]

Was it Invasion?
http://imdb.com/title/tt0460651/

[ricky1000]

invasion..it was axed in the usa after the 1st series due to poor ratings, so we will never know what happened