"The Killer Shrews" is cut! The opening narration of the film itself is removed, per fans at the MST3K Review discussion board:
Don't know why this was done as of yet, but I thought Rhino knew better than this. If you're going to release a cut episode, you gotta tell the customer ahead of time. I'm sick of this BS!!!!!!!!!!!!!!!!!!
Apparently, the opening narration has some good riffs and is alluded to later in the ep by one of the SOL members who says something to the effect of "Wasn't this already covered in the opening narration?"
Edit: I updated the thread link to a better thread. This one has an .mp3 posted of what was cut.
Transcript of the missing footage here:
Narrator: Those who hunt by night will tell you, that the wildest and most vicious of all animals..."
Joel: "Are in Vegas?"
Narrator: "Is the Shrew!"
All: "A Shrew? Oh come on!" (chuckling)
Narrator: "... it feeds only by the dark of the moon"
Crow: "You just go with us on that one, okay?"
Narrator: "He must eat his own body weight..."
Servo: "Plus a delicous shake"
Narrator: "Or die"