It was renewed
I saw this this season on CBS’s summer series Salvation about an asteroid on a collision course with Earth.
In the final episode, this Season 2 ended with the asteriod mysteriously changing course and going behind the moon. Then a sudden burst of light.
We have to wait until next summer (assuming the series is renewed) to find out whether aliens were driving the asteroid.
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Perhaps the Nazi colony on the far side of the moon blew it up. ;-)