At this episode a team of soldiers discovered a dome in a forest clearing. This dome was like a shield, and the soldiers could see inside but not enter. Inside the dome there was a cabin and a Amish family (dad, mum and 2 kids) living their life normally but they couldn't see the soldiers camping outside the dome.

At some point a scientist discovered a way to enter the dome (by throwing ice cubes on the energy shield or something like that I can't remember) and two solders entered. At first contact, the solders met gruesome death since the innocent looking Amish family were actually cannibals...

It might be twilight zone or some clone show...

It's an episode of Night Visions called A View Through the Window: Night Visions: A View Through the Window Recap - TV.com

Cool thanks mate

You're welcome.