Gandalf is a fictional wizard in J. R. R. Tolkien's novels The Hobbit and The Lord of the Rings.
After confusing Tara Lipinski for Oksana Baiul's drinking problem in "Griffin Winter Games", Brian points out to Stewie that "Oksana Baiul" sounds like something Gandalf would say. A cutaway gag shows Gandalf opening a doorway but calling out "Oksana Baiul," who appears and drunkenly smashes down the door with her car before staggering away while swigging from a bottle.