Simplify the following text for a Grade 6 native English-speaking person.
Original: `` Treehouse of Horror II '' is the seventh episode of The Simpsons third season , the second Simpsons Halloween episode , and the first Halloween episode where names in the closing credits were replaced by ` spooky name ' parodies .
Simplified: `` Treehouse of Horror II '' is the seventh episode of The Simpsons third season .