Lost was on ABC from 2004 until 2010 and along the way, it increased in popularity. It's one of those shows that fans will always remember, but probably would have a hard time re-watching. A lot went down in the show and it has gone down as one of the best shows in history. The show was jam-packed with Easter eggs, question marks, clues, and a few monsters that could be on The Sci-Fi Channel.

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Superfans may think they know everything there is to know about the critically acclaimed series, but the 10 secrets below might surprise them and encourage them to binge-watch Lost once more.

Michael Keaton Was Originally Cast As Jack Shephard

Jack Shephard, played by Matthew Fox, was the unannounced leader and front-runner of the show, but he wasn't always the actor the casting crew had their sights on. Originally, Jack was supposed to die in the pilot, which would've made the show a lot different.

In fact, iconic actor Michael Keaton was initially cast in the role. When the script was changed and Jack lived on, Keaton dropped out, as he didn't want to be committed to one show.

The Show Was Called "Nowhere" (For A Bit)

Lost is a very simple name for a TV show, but it worked well in its obviousness, so it's hard to believe that it wasn't always destined to have that title. The series was called Nowhere for awhile, but Lost seems more fitting at the end.

In fact, the meaning of the show's title eventually took on a few different meanings and became much more memorable.

ABC Entertainment Chairman, Lloyd Braun, Got The Idea From Watching The Movie, Cast Away

Brilliant ideas come to brilliant minds at odd hours. For Lloyd Braun, it was while he was on vacation in Hawaii. He thought that a mishmash between SurvivorLord of the Flies, and Cast Away would be the perfect television show, even though his colleagues weren't entirely sold on it at first.

Another fun fact is that Braun voiced the "Previously on Lost" intro segment for the episodes.

The Dharma Initiative Was Originally Going to Be Called Medusa Corp

The Dharma Initiative was a big deal in later seasons and it always had a mysterious cloud around it.

It took a long time to realize what the Dharma Initiative was doing on the island, being that the people behind it were trying to change mankind's destiny.

There Isn't A Single Cast Member That Appears In Every Episode Of The Series

After six seasons and 121 episodes, there were a lot of characters that appeared in the show. So much so that even the main cast didn't appear in every single episode. This is a bit of a rarity since there's usually a "main" character, as well as an ensemble cast that works with them.

There was a lot of character development and stories occurring throughout the series, so it makes sense that not one character hogged the screen time.

Sawyer's Character Was Supposed To Be A Classy Older Man, Until Actor Josh Holloway Changed It

It's hard to picture Sawyer as anyone other than actor Josh Holloway, but he wasn't always the guy the director had in mind. Although the character of Sawyer was always a con-man, he was supposed to be much older. While Sawyer fans know he had a twangy, Southern accent, originally he was supposed to be from Buffalo, NY.

RELATED: Lost: The 10 Biggest Ways Sawyer Changed Throughout The Show

The casting team changed their minds when Holloway forgot a line during his audition and threw a chair across the room. Thus, the younger, Southern Sawyer was born.

The Pilot Episode Was The Most Expensive In ABC's History

In the fall of 2004, the pilot of Lost debuted. Things have changed since then, but at the time, it was the most expensive pilot that ABC had ever produced.

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In fact, ABC hasn't shot a more expensive pilot to this day. It's clear they put a lot of time and money into the first episode and it's a good thing because it was a hit.

The plane crashed on the beach on Lost

A good film or television show's soundtrack can increase the chances of people remembering it or forgetting it. In this case, since the pilot was so expensive and the crew was still reeling from the expenses, the show had to take advantage of whatever they could.

Since they spent so much money on the crash scene, composer Michael Giacchino experimented with the pieces and thus, one of the best scores was created.

NEXT: Lost: 15 Unresolved Mysteries And Plot Holes The Show Left Hanging