Number 47: (inverted) Sydney and Vaughn's plane's registration number is NC9746C.
This episode begins in media res.
We find out that there are three Derevko sisters: Irina, Katya and Elena.
Sydney: We'll find each other. We always find each other.
Vaughn: (to Sydney) Bad enough being a fugitive in North Korea. Now I have to find out that you slept with Will?
Italo Calvino's Mr. Palomar
Italo Calvino was a Twentieth Century Italian writer and novelist. Mr. Palomar was written in 1983 and it revolves around the title character who is set in several situations which he analyzes to a degree almost of unreality, always trying to order and meaning in everything.
Alice's Adventures in Wonderland
Jack was reading Alice's Adventures in Wonderland in Sydney's apartment. The book is a satirical children's book written by Lewis Carroll and published on July 4, 1865.