I loved this episode. It has elements of Star Trek (there are, I think, several Star Trek episodes with the same idea) and Babylon 5 (think of the B5 episodes that have telepaths messing with people's memories ).
Collteral Damage is all about Mitchell. It's the boy meets girl, boy likes girl, girl gets murdered story. Mitchell, naturally, is framed for the murder, but what really happened? Who actually killed her?
The ending was slightly disappointing for me, in that it wasn't exactly what I was expecting. I'm still unsure if there was more to it, or, if, in fact, the resolution did tie up all the loose ends.
Another plus, is having William Atherton as the Emissary. He plays the part very well here. Is he the bad guy, or is he simply protecting the interests of his people?