This was a very confusing episode. First, it seemed to play up the fact that the Andromeda is now fully crewed. Yet earlier and later episodes this season do not show the same crew level. Apparently, the amount of crew (full or none) varies depending on the week's plot.
Second, the motivation of several of the events if never really clear. Why did the aliens want this particular planet? If Trance's family was helping the aliens, how did they know and why didn't Trance know they were helping? Why didn't Trance help? Tyr's actions were very confused and non-linear as well as being out of character.
This is one of the worst episodes yet in my opinion and I am rapidly losing faith in this series. It started so good with the first season.