- Whiz Kid: There is another flash and Sawyer says to Daniel, "So when are we now, whiz kid?" (Ep: 5x1, Because You Left)
- Danny Boy: Daniel says they can't change things and Sawyer says, "How do you know so much about this, Danny boy?" (Ep: 5x1, Because You Left)
- Dr. Wizard: Daniel comes out of the jungle and Sawyer says, "Welcome back, Dr. Wizard." Miles says, "I think it's Mr. Wizard." (Ep: 5x2, The Lie)
- Watch Mr. Wizard was a children's tv program in the 1950s that explained the science behind ordinary things.
- Plato: Daniel says they can't change what has happened and Sawyer says, "Yeah thanks anyway, Plato, I'm going over there." (Ep: 5x8, LeFleur)
- Plato was a student of Socrates and a classical Greek philosopher around 428 BC.
- Mad Scientist: Sawyer calls him this when he's talking Juliet onto staying on the island. (Ep: 5x8, LaFleur)
- Twitchy: Daniel and Miles show up at Sawyer's during a meeting to figure out what they should do next. Sawyer says, "Welcome to the meeting, Twitchy." (Ep: 5x14, The Variable)
- Sawyer is referring to the fact that Daniel has a tendency to twitch.
- H.G. Wells: Sawyer doesn't want Kate to help Daniel despite Jack saying she has her reasons. "Whatever her reason is, helping H.G. Wells, here, talk to his mommy ain't got nothing to do with it," Sawyer says. (Ep: 5x14, The Variable)
- Herbert George Wells was an English author best known for his work in science fiction in the early 1900s.