With Walter dropping Black Blotter Acid, this opens up the episode to be one of the oddest episodes in the entire series. Odd, even by Fringe standards. If you remember the animated episode from a few seasons back you should have an idea what this one is like. I did get a kick out of Walter's minds eye when he was trying to remember the secret password as it took on the look and feel of The Beatles Yellow Submarine animated cartoon with live action cut outs. Very interesting episode for sure and not bad by any stretch at all.