In mad scientist Walter Bishop's storytale version of reality, Walter's a lovable inventor who's created everything that little children love: rainbows, bubble gum, hugs... and singing corpses. Of course. Also, check out Gene the Cow's makeover!
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Broyles on the piano was all sorts of amazing.
I think the patching up scene with Astrid and Olivia will go down in franchise history as "the scene that launched a thousand 'ships".