There couldn't be a new energy screen that he hadn't heard of.

I've an idea his energy screen may have certain weaknesses.

I had already come too close to the energy screen.

I needed do no more than climb out of the ship after we landed and walk up to the energy screen.

His job was to get to the control room and turn on the ship's energy screen.

For the moment we are safe behind our energy screen.

Was it their imagination or had the energy screen given out?

"There are too many energy screens and they prevent a good contact."

Only 150 feet away, the energy screen arched into the sky.

It must be an energy screen of some sort, but I can't imagine what.