Good Grief - S6-E1
Visible crew/equipment: The shot after Frasier says "I'm quite sure" a mic appears from above. (00:18:35)

Starring: Kelsey Grammer, David Hyde Pierce, John Mahoney, Jane Leeves, Peri Gilpin
Good Grief - S6-E1
Visible crew/equipment: The shot after Frasier says "I'm quite sure" a mic appears from above. (00:18:35)
Sleeping with the Enemy - S3-E6
Character mistake: Noel Shempsky (the supposed Star Trek Nerd) attributes the quote "The needs of the many outweigh the needs of the few or the one" to James T. Kirk, when it was Spock who said it. (00:03:50)
Selling Out - S1-E9
Frasier: Roger, at Cornell University they have an incredible piece of scientific equipment known as the Tunneling Electron Microscope. Now, this microscope is so powerful that by firing electrons you can actually see images of the atom, the infinitesimally minute building blocks of our universe. Roger, if I were using that microscope right now, I still wouldn't be able to locate my interest in your problem.
Chosen answer: The turkey's stuffing.