Trick or Treat?

Gowron: "What is this? Candy? Where are the targ-hearts and wrapped gagh?! This had better be some kind of Halloween trick, you p'tach!"

Green 'n Lean

Pike: "WOW, Honey! I know this is only your costume for Halloween, but you can wear this one ANY night!"

Data Fail

Riker: "You mean you're going trick-or-treating as your brother Lore? That's pretty lame, Data."

Assimilation is Futile

Picard: "Oh come now, Guinan! This is only my Halloween costume! I haven't actually been assimilated again!"

Party 'till it Hurts

It seemed that no one could ever beat him in the "best costume" contest held at the annual Halloween party, but Picard would be the first to admit that getting into his Locutus costume and wearing it for hours really gave him a headache.