It was the best of timelines, it was the worst of timelines.

We count down the cult fave’s most fascinating, trippy, and game-changing installments.

“An Origin Story”

Season 5, Episode 5Writer:J.H.

Fringe | Season 5, episode 9 Writer: Kristin Cantrell Director: Tommy Gromley (with animation by 6 Point Harness) Walter Bishop’s most epic LSD trip ever — an

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“Letters of Transit”

Season 4, Episode 19Writers:Akiva Goldsman, J.H.

“The Day We Died”

Season 3, Episode 22Writers:Jeff Pinkner and J.H.

“A Short Story About Love”

Season 4, Episode 15Writers:J.H.

Fringe | Season 5, episode 5 Writer: J.H. Wyman Director: PJ Pesce Fringe worked one of its best themes — the dehumanization we risk by seeking to

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Wyman and Graham RolandDirector:J.H.

Icky, but a bonus.

“Lysergic Acid Diethylamide”

Season 3, Episode 19Writers:Akiva Goldsman, Jeff Pinkner, J.H.

Fringe | Season 4, episode 19 Writers: Akiva Goldsman, J.H. Wyman, Jeff Pinkner Director: Joe Chappelle What at first seemed to be one of Fringe ’s nutty

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Among many memorable bits: the lengthy animated sequence (“Belly, why are you a cartoon?

“The Arrival”

Season 1, Episode 4Writers:Jeff Pinkner andJ.J.

The couple was well-played by real-life husband-and-wife Stephen Root and Romy Rosemont.

Fringe | Season 3, episode 22 Writers: Jeff Pinkner and J.H. Wyman (with Akiva Goldsman) Director: Joe Chappelle Reboot or no reboot, Observageddon or no Observageddon, Fringe

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The key focus: making Olivia a richer, warmer, more proactive character.

So began a series of rookie-year corrections that helpedFringefind its voice.

“There’s More Than One of Everything”

Season 1, Episode 20Writers:Jeff Pinkner and J.H.

Fringe | Season 4, episode 15 Writers: J.H. Wyman and Graham Roland Director: J.H. Wyman The timeline reboot of season 4 frustrated some fans, but the premise

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Wyman (story by Akiva Goldsman and Bryan Burk)Director:Brad Anderson

The episode that changed everything.

Damn that David Robert Jones 2.0, experimenting with merging parallel universes together!

“Entrada”

Season 3, Episode 8Writers:J.H.

Fringe | Season 3, episode 19 Writers: Akiva Goldsman, Jeff Pinkner, J.H. Wyman Director: Joe Chappelle (with animation by 6 Point Harness) Another nutty number 19, another

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She deserved an Emmy nomination for her work this season.

“Brown Betty”

Season 2, Episode 20Writers:Jeff Pinkner, J.H.

It could never do it enough.

Fringe | Season 3, episode 3 Writers: Alison Schapker and Monica Owusu-Breen Director: Brad Anderson The first half of Fringe ’s celebrated third season alternated between episodes

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to Joshua Jackson for being too chicken to sing.)

“Subject 13”

Season 3, Episode 15Writers:Jeff Pinkner, J.H.

“Subject 13” was so essential, so emotionally wrenching, it deserves to share the No.

Fringe | Season 1, episode 4 Writers: Jeff Pinkner and J.J. Abrams Director: Paul Edwards In which we were formally, memorably introduced to the Observer known as

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2 spot on this list with its hinge episode…

2.

“Peter”

Season 2, Episode 16Writers:Jeff Pinkner, J.H.

But it was not the model episode ofFringe.

Fringe | Season 3, episode 9 Writers: Alison Schapker and Monica Owusu-Breen Director: Joe Chappelle A strong, disturbing outing that was part of Fringe ’s mid-series peak,

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That distinction goes to our choice for No.

“White Tulip”

Season 2, Episode 18Writers:J.H.

Fringe | Season 4, episode 6 Writers: Robert Chiappetta and Glen Whitman Director: Brad Anderson An episode worthy of one of Fringe ’s key inspirations, The Twilight

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Fringe | Season 1, episode 11 Writers: J.J. Abrams, Jeff Pinkner, Alex Kurtzman, Roberto Orci Director: Frederick E.O. Toye Arriving midway through Fringe ’s shaky first season,

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Fringe | Season 1, episode 10 Writers: Jason Cahill and David H. Goodman Director: Michael Zinberg Remember ‘‘The Pattern,’’ the nebulous term for all the dangerous outbreaks

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Fringe | Season 1, episode 20 Writers: Jeff Pinkner and J.H. Wyman (story by Akiva Goldsman and Bryan Burk) Director: Brad Anderson The episode that changed everything.

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Fringe | Season 4, episode 12 Writers: J.R. Orci and Graham Roland Director: David Straiton The standout installment of Fringe ’s admirably ambitious but ultimately frustrating Rebootlandia

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Fringe | Season 3, episode 8 Writers: J.H. Wyman and Jeff Pinkner Director: Brad Anderson The sensational climax to season 3’s sensational Olivia/Fauxlivia parallel universe interplay, which

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Fringe | Season 2, episode 20 Writers: Jeff Pinkner, J.H. Wyman, Akiva Goldsman Director: Seth Mann The late season lark that officially launched a tradition for similar

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Fringe | Season 3, episode 15 Writers: Jeff Pinkner, J.H. Wyman, Akiva Goldsman Director: Frederick E. O. Toye The second most important mythological episode in Fringe history

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Fringe | Season 2, episode 16 Writers: Jeff Pinkner, J.H. Wyman, Josh Singer (story by Pinkner, Wyman, Akiva Goldsman, Singer) Director: David Straiton The origin story of

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Fringe | Season 2, episode 18 Writers: J.H. Wyman and Jeff Vlaming Director: Thomas Yatsko Peter Weller, in a beautifully modulated performance, played scientist Alistair Peck, who

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