Maybe Sergh would no longer be interested in surveying these strange intruders after he'd finished that conversation.

He sat down at the control console and stated that the automatic search instruments had meanwhile lost sight of the strange intruders.

Out of its depths had stepped a strange intruder, whose very presence showed that he had found a mode of secret entrance.

No curious sea life bothered investigating the strange intruder falling into their liquid domain.

The strange intruder clumped steadily forward to thrust a square box on to the table.

All of them listened intently to the report of a strange intruder in the outer system.

I can see that this strange intruder presents a special problem for defenseespecially if it won't communicate.

Sometimes, in the earliest years, they were joined by strange intruders whose function has never been completely unriddled.

Moreover, the strange, unexpected intruder was able to observe Ping's gang of followers.

The second caiman was also testing these strange intruders.