We'd have been much worse to him than hostile aliens.

"We have possibly hostile aliens on the bridge, in a tactical situation."

In the year 2445, a race of hostile aquatic aliens arrives on Earth.

"Are we supposed to think that they'd make any practical difference against hostile aliens?"

But he had sent them to his masters, not a bunch of hostile aliens.

But then, so would anything else that might be here, and he wasn't keen to give his position away to any potentially hostile aliens.

This is the first time in history that the human race has encountered hostile aliens who came to us through normal space.

First, it gives them precedent for firing on us as hostile aliens.

The astronauts were killed by hostile aliens during their mission to Mars.

And having another human close by was comforting in this room full of hostile aliens.