I shall have to use some pretty tricky gadgets to get us through the perimeter alarms.

If that was the case, it still didn't explain how she had gotten into the garden without tripping any of the perimeter alarms.

The weird thing was, it wasn't one of his perimeter alarms.

"I found some small perimeter alarms," he said.

He selected the security display and saw that according to established routine, the Tings had engaged the perimeter alarm.

The perimeter alarm is off at the side door.

"I wouldn't be surprised if-" Just then the perimeter alarm sounded, and he slid into the command chair.

This has turned out to be a minor incident, but we had no way of knowing that when the perimeter alarm sounded.

That was when my perimeter alarms started to go off, and by then it was far too late.

Instead, his perimeter alarms were informing him of something that, seconds later, Kebron did as well.