Looking back on this show which I saw in re-runs, one does wonder about certain things. Did Al get any time off from his Observer job? Did his fashion choices indicate he was colour blind? Even in the series finale the duo never got a reunion hug after years of incorporeality. In fact did Sam erase their friendship by his actions in the series finale by saving Al's first marriage? Sam needed to save Al's marriage to his soulmate Beth after the crap Sam pulled in the Vietnam eps but was their a price? Does Sam have a home timeline to leap back to? If not, is that why he never returned home? With al's past changed so radically, he will be someone else entirely. After knowing him for five seasons, Sam has fundamentally changed who his best friend is. We don't know who Al is anymore. How depressing.