Treehouse of Horror XII

a). "hex and the city"
The family sees a gypsy, but Homer's usual ineptitude causes the gypsy to seek her revenge by cursing him and his loved ones.  In an effort to get the curse lifted, Homer catches a leprechaun and releases it upon the gypsy with surprising results.
b). "House of Whacks"
The family home obtains an upgrade, the Ultrahouse 3000, a computer that will do everything for them.  Everything is going great until the house falls in love with Marge and tries killing Homer.
c). "Wiz Kids"
Bart and Lisa are attending wizard school.  The evil Lord Montymort and Slithers have designs on capturing Lisa, so that Montymort can take her essence.  They use Bart's rivalry with his sister as the means to get at her.