Frank Conniff: Frank Conniff. Writer: Mystery Science Theater 3000. Frank Conniff is a comedy writer and performer who began his TV career writing for the Peabody award winning Comedy Central series "Mystery Science Theater 3000," where he also played "TV's Frank,"the bumbling yet lovable mad scientist sidekick. He then went on to be a writer, producer and actor on the ABC TV series "Sabrina the Teenage Witch" and he was a writer...
Known For: Mystery Science Theater 3000 (Writer), God Bless America (Stan Kurtz), Invader ZIM (Writer), Sabrina the Teenage Witch (Writer)