Die gestohlenen Weihnachtsgeschenke

Boris Karloff's voice changes when he speaks for the Grinch. Originally he spoke in his "Narrator" voice throughout. After recording was complete, the highs in his voice were mechanically removed for the Grinch, giving him the gravelly voice heard in the finished version.

As the Grinch closes the bedroom door, the part of the coat visible between his arm and collar are left unpainted.

The complete credit for Boris Karloff in the opening credits reads as follows: "the sounds of the Grinch are by Boris Karloff... and read by Boris Karloff too!"

American network TV prints often eliminate the verse from "You're a Mean One, Mr. Grinch" that begins, "You're a rotter, Mr. Grinch." In addition, a sequence showing the Grinch leering at a little girl with an evil grin is usually deleted.

Edited into In Search of Dr. Seuss (1994)