As Sikozu steps off the elevator, Crichton makes the Vulcan 'live long and prosper' hand sign.
John mentions a blue light special. The Blue Light Special was a Kmart sale promotion within the store for a short period within store hours only. It was advertised using a rotating blue light, in the same style a police car used, and was announced over the store public address system with the phrase "attention Kmart shoppers", a phrase which became a pop culture reference.
The 4th season trilogy "We're so Screwed" is known by the individual episode titles: "Fetal Attraction"; "Hot to Katratzi" and "La Bomba" in the UK. The UK didn't approve of the trilogy title.