Gravity Falls
Twin brother and sister Dipper and Mabel Pines are in for an unexpected adventure when they spend the summer helping their great uncle Stan run a tourist trap in the mysterious town of Gravity Falls, Oregon.

Season 2 · Episode 15 ·
The Last Mabelcorn
A new threat leads Mabel to venture into the enchanted realm of the unicorns. Meanwhile, Dipper learns an unexpected twist about the enigmatic Bill Cipher.
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Episode 15 of season 2 of Gravity Falls: “The Last Mabelcorn”. Aired 2015-09-07. Watch it online free on ZapFlix.