- Sioux City Sasparilla is a brand soft drink, similar to root beer, made famous by The Big Lebowski
- "What's the frequency Kenneth?" is a quote made famous by Dan Rather, then later by R.E.M. . The question was asked by a man who claimed that the news media was beaming signals into his head.
- The Fisher King was in charge of protecting the Holy Grail (and also a movie by Terry Gilliam)
There are a lot of allusions in this week's Walter's Lab Notes: