Continuity mistake: When the two children visit the Ghostbusters the little girl is wearing a pink pajama top and pink bottoms. In the next scene the pajama bottoms change color and are now orange.
Mr. Sandman, Dream Me a Dream - S1-E7
Character mistake: The cover of Weird Fiction magazine is spelled "Wierd Fiction." (00:05:15)
Ghosts R Us - S1-E1
Continuity mistake: In the first scene, when the Ghostbusters are rushing to the factory, Ecto-1's license plate reads ECT-1.