Season 4, Episode 15
Blockheads
George-Michael tries to reconnect with his father, but is finding himself overwhelmed by the responsibility of running his business.
6 recurring jokes in this episode

G.O.B.
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Mr. F
The Mr. F theme plays when Michael sees Lucille Austero's demand for $700,000.
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Forget-Me-Nows
G.O.B. tries to feed George Michael a forget-me-now in a piece of bologna so that he will forget the Gothic Castle.
G.O.B. gives Michael a forget-me-now after he sees Tony Wonder.
Narrator mentions roofie circles.

Buster
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missing limbs
Buster's gigantic hand gets blood on it, which is why he's a suspect in Lucille 2's disappearance.

George Michael
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... has perfect rhythm
George Michael is afraid Rebel Alley won't love him if she finds out he's not a software genius but just a guy with impeccable rhythm.

Miscellaneous
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"That was a freebie."
George Michael: "I got kicked out of my dorm." G.O.B.: "That was a freebie."