His gaze reveals the faces of Jack Shephard (Matthew Fox) and John Locke (Terry O'Quinn) standing around the now open Hatch shaft.

After being chastised by his father (John Terry) about his pessimistic bedside manner, Jack operates on Sarah, and goes running a tour de stade.

While running he falls, and meets another runner named Desmond (Henry Ian Cusick), who tells him that he is training for a race around the world.

At the same time, at the caves, Shannon Rutherford (Maggie Grace) and Sayid Jarrah (Naveen Andrews) search the jungle for Walt's (Malcolm David Kelley) dog, Vincent.

Back at the caves, after informing the survivors why they went into the jungle and that Dr. Arzt (Daniel Roebuck) is dead, Jack decides that he is going after Kate and Locke.

While exploring, he comes across a painted mural, and a wall where the key hanging around his neck is pulled by a strong magnetic force.

[2] The producers decided to start the episode inside The Swan because they considered the audience would expect to pick up from Locke and Jack looking into the hatch shaft, so the opening instead is filmed in a place that does not reveal its location or period - director Jack Bender stated it made him remember a San Francisco apartment - until the explosion of the hatch.

Sarah's operation was filmed in an actual surgery room in Oahu,[2] while Aloha Stadium in Honolulu is used for Jack and Desmond's tour de stade.

Lindelof picked the song as it reminded him of his childhood, as his mother "used to listen to on Sunday mornings, when she’d put on music, vacuum and cry.

"[2] Lindelof also declared that the song "lyrically felt right", and had a haunting feeling due to Mama Cass' personal history.

Jeff Jensen of Entertainment Weekly was frustrated at the episode not revealing what happened to the raft characters and unveiling of so many new mysteries, but liked the writing and symbolism considering that "the whole enigmatic enterprise seemed grounded in rich layers of meaning".

[13] Director of photography Michael Bonvillain was nominated for a Primetime Emmy Award for Outstanding Cinematography for a Single-Camera Series for this episode.