Iceman said:
I like to think that the church scene was told through Jack's perspective, but the rest of the purgatory storyline.. there were several episodes within which Jack was completely absent.. same goes for almost a third (my guess) of the other episodes throughout the series.
Jack was in 113 episodes.
Jack's total episode count is 113 (as of the series finale, "The End").
Jack only appeared in archive footage in "Across the Sea" - in a scene from "House of the Rising Sun".
Jack is one of the six characters to have their first flashback in the episode they first appeared in. The other five are Juliet, Charlotte, Lapidus, Miles and Jacob.
Jack was the first character to ever have a flashback and a flash-forward.
However, he was only the third character to have a traditional centric episode after Kate and Locke.
The first episodes of seasons 1, 2, and 3 featured Jack's flashbacks.
He was also the first character to have a flash-forward centered around him, in "Through the Looking Glass", and later had several more in season 4. He later had a centric episode in Season 5 ("316"), and had seven episodes that were partially Jack Centric in Season 6 ("LA X, Part 1") ("LA X, Part 2"), ("Lighthouse"), ("The Last Recruit"), ("The Candidate"), ("What They Died For"), and ("The End"), giving him a total of 22 centric episodes.
Both Nikki, and Paulo, even taken together, appeared in fewer episodes than Jack has centric.
As of "So It Begins", Jack's mobisode count is 5, which makes him one of the two most appearing mobisode characters, along with Michael with also 5 appearances.
Jack generally has the most appearances or ties for the most appearances in a season. The only exception is season 3, where he was second to Kate.
Jack was the nineteenth main character to die, and the last main character to die on screen.
Jack and Kate are the only characters to appear in every season premiere of the series.
More main characters have died in Jack-centric episodes than any other: Boone ("Do No Harm"), Charlie ("Through the Looking Glass, Part 2"), Michael ("There's No Place Like Home, Part 3"), Juliet ("LA X, Part 1"), Sayid, Jin, and Sun have all died in episodes that were at least partially Jack centric. ("The Candidate") Both The Man in Black and Jack have died in an episode that is partially Jack centric as well. ("The End")