She needed to rest before tackling the alien signal again.

Maybe she should give Carstairs a crack at the alien signal.

There were also seventeen references related to the alien signals.

Perhaps the alien signal was to blame for both?

No, the alien signal was not difficult to locate.

Did he think he was playing a game of tag with the alien signal?

Looks like a batch of new trouble with that alien signal or whatever the hell it is.

They satisfy all but one of our criteria for a genuine alien signal.

They are happy to be going to Kwajalein, to study the alien signals.

Besides, we need you to monitor the alien signals so you can tell us about any changes in them.