Cool episode, but Isaac being allowed back on the ship screams of being one of those Hollywood things that only happen because the actors all have contracts. There is an excellent chance that some of the people killed when the Kaylons boarded had children. It's nice that the doctor's kids got their daddy back, but I doubt any of the children orphaned see it that way. I suspect that some future episode will milk this for drama, but it's hard to buy that he would be onboard long enough for there to be some confrontation between Isaac and some widow(er) and their kids.