Could be Silent Threat.
There was also the mission where the PVD Prophecy shows up for a visit with the Bastion.
And Earth's like, "Oh god, we're all going to die!!"
And Alpha 1's like, "Don't worry, I'll save you!"
And the Lucifer's like, "hahahaha n00bs oh crap i'm dead"
And then Earth's like "yay!! oh **** there goes subspace"