Adelaide! Adelaide! C'mon and join the Adelaide parade! That's right, the bus is headed through the Unknown in this week's episode honoring the 10th anniversary of the fall-favorite Cartoon Network show, Over the Garden Wall (watch it, it's on Hulu!). How well do Cooper (Wirt), Rachel (Greg), and Cameron (Beatrice) know their rock facts, and who will be the one to vanquish the Beast?