Brooke and Tyler climb to the top of the Worldtree to explain what in the dimension is going on with upstream, downstream, trunks, and twigs. If you found yourself wondering what in the world allowed the dimension-hopping shenanigans then listen in for 93% nonsense, 6% string theory, 4% physics, and 2% butterscotch ripple. #AllSpoilers

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Original music by David Gruwier. "Radiant" by David Gruwier.