Star Trek, TOS, Episode was called "Spock's Brain".
Pretty gal surgically removes Spock's brain without killing him. Dr. McCoy puts him on auto-pilot and they look for who took it.
The gal was temporarily made brilliant by a machine. Since it wore off, she couldn't remember, and when they grill her about the missing brain, she gets exasperated and says "brain and brain! what is brain?!"
You had to be there ;^)
Wow it's great to be able to actually keep up with the posts now :)
You came in a close second place, :O) Gongarats!
PS: Once again, it is proven that FReepers are awesome!