We might be talking about different events.
[SPOILER]
The one I'm thinking about, starts with an Engi on a ship, saying something like "Strange bug. Help with debugging?" One option is to tell him you don't have time for any hacking, and the other is the blue option, to send your human to help. Then, you find out that it's a deranged Mantis, who thinks he's a human. He was disallowed from joining the local space-army, because of this. Your option is to let him join your crew, or take him home to his family.
[/SPOILER]
P.S.
We need spoiler tags on this forum. :S