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My personal favs:
Characters: Torgo, the caretaker in "Manos, the Hands of Fate"
Host segment: Tom Servo's "Christmas in Space" essay...for those who know "I mean sure Santa's face would be red, it's a vacum out there. And the reindeer! Ohhh the reindeer...Donner, BOOM! Prancer, BOOM!"
Favorite Episode:
Tough one...have to cheese out here and give multiple answers: Deathstalker and the Warriors from Hell, Warrior of the Lost World ("Make it slooooww Mega-Weapon"), and The Undead.