On the wall of Principal Reynolds's office there is a large photograph of what appears to be a scenic shot of the island.
The timing of the flash-sideways setting is left unclear by contradictory indicators. Alex's mention of the European History AP test being on Friday places the episode in early May, the only time the test is offered, but her request for a letter of recommendation to Yale places the episode earlier, during college application season, September through February. The year of the flash sideways is similarly in doubt: if flash-sideways Alex was born in the same year as her counterpart, she would be 15 years old in 2004, exceptionally young to be applying to Yale.
Jorge Garcia confirmed on his own podcast that he added in Hurley's line where he asks Richard Alpert if he's a "vampire". Garcia wasn't sure if the line would be left in, but to his own surprise, it was.
Hurley comments on how Richard hasn't aged in 30 years. Yet he never met Richard in the 70s.
When Dr. Arzt and Dr. Linus are speaking, Dr. Arzt's shirt is shown with the top button open in some shots, and closed in other shots.
At the scene inside the Black Rock, both Jack and Richard had marked stubble. When they arrived at the beach, both were almost clean shaved.
When Ilana is guarding Ben while he's digging the grave, in some shots the rifle is covered in sand and in others it is clean.
When Alex and Ben are discussing Alex's history test, a piece of Alex's hair is behind her head in some shots, and over her shoulder in some other shots.
This is the first episode to have flash-sideways focused around someone who was not on Flight 815 in either timeline.
Ilana: Where will you go?
Ben: To Locke.
Ben: Because he's the only one who'll have me.
Ilana: I'll have you.
Ilana: Pick it up and start digging!
Ben: Digging what?
Ilana: A grave.
Ben: For who?
Ilana: You murdered Jacob. It's for you.
Frank: Can you believe it? Imagine how different my life would be had that alarm gone off.
Ben: How different world it have been? The island still got you in the end. Didn't it?
Ilana: Jacob was the closest thing I ever had to a father.
Ben: I appreciate the sentiment, but who's going to listen to me?
(John raises his hand)
John: I'm listening.
Though credited, Naveen Andrews (Sayid), Henry Ian Cusick (Desmond), Emilie de Ravin (Claire), Josh Holloway (Sawyer), Daniel Dae Kim (Jin), and Evangeline Lilly (Kate) do not appear in this episode.
Jon Gries has played Roger Linus as a young man in 1964, a middle-age man in 1973 and 1977, an older middle-aged man in 1992 and an old man in 2004. This is the longest age range the same actor has played a character on the show (40 years) that ages naturally.
Original International Air Dates:
Canada: March 9, 2010 on CTV
United Kingdom: March 12, 2010 on Sky1
The Netherlands: March 12, 2010 on Net5
Spain: March 16, 2010 on FOX
Australia: March 17, 2010 on 7TWO
Portugal: March 17, 2010 on Fox
Latin America: March 23, 2010 on Canal AXN
Finland: April 1, 2010 on Nelonen
Norway: April 14, 2010 on TVNorge
Germany: April 28, 2010 on FOX
Sweden: May 12, 2010 on TV4
Czech Republic: May 17, 2010 on AXN
A Ben-centric episode.
Star Wars: The "Man In Black" removes Ben's leg iron with a slight gesture, much like Emperor Palpatine uncuffs Luke Skywalker in "Return of the Jedi".
The East India Trading Company: A teaching subject of Alex. It was an early English joint-stock company that was formed initially for pursuing trade with the East Indies, but that ended up trading mainly with the Indian subcontinent and China. The Company was granted an English Royal Charter by Elizabeth I on 31 December 1600.
The Terminator: Hurley asked if Richard was traveling through time or if he was a cyborg, both in regards to how he appeared to not age, referencing the main character in this 1984 American tech-noir action film.