In the 30th Anniversary for the Treehouse of Horror series, three enemies from past THOH return. In Beefzilla vs Hotdogra, Beefzilla is revived to fight Hotdogra, in GLITCHED VIRUS, the virus returns; and even deadlier, and in SAWed: The Simpson Trap, SideSAW Bob returns to torture The Simpsons.

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