(Spoiler Alert) As an individual episode,this was on so-so. The writers tried to do too much to fast. As a series ending episode is great one but, only if you actually take the time to think of the entire series. Kyle starts out as a pure innocent child in the world and by the time the episode is over that innocence (light) is gone and Kyle has "grown up" in that he now is acting like every adult by lying, stealing, and possibly by committing murder (dark) (tho, that one is debatable and Cassidy had it coming). One the other hand Jessie grew up in reverse. She started out dark by murdering the camper (he had it coming) and by the end of the series has now learned compassion, caring, and not to use force as a first instinct (light). The two evolved in reverse with Kyle from light -> dark and Jessie from dark -> light, excellent. The lie (yes a lie) from Cassidy that he was Kyle's brother would only work if Cassidy was Adam's brother since we know that Kyle was a clone of Adam and Since Adam was in the same generation as Cassidy's mom this lie falls apart. If the lie was true then that even pulls in a Cain/Able storyline with the first historical human murder, excellent again.
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