And while the cause of most of these sleep remnants is fairly obvious, the reason behind those sometimes-sticky, sometimes-crusty gobs of crud that can dot the lashes or cling to the corners of the eye is less clear.
Santa's Little Helper's initial appearance on The Simpsons was in the first episode of the series, Simpsons Roasting on an Open Fire, which aired on Dec. 17, 1989. Since then, he has become a recurring character.
Santa's Little Helper growling at the Simpson family. Santa's Little Helper has also shown aptitude in other areas. When neglected by the Simpson family, he ran away, and was adopted by Mr. Burns, and made into a very fearsome guard dog.