In the series premiere, 100 young exiles from a dying space station are sent to the planet Earth 97 years after a nuclear apocalypse to see if it's habitable.

The 100

Pilot

After discovering that Jasper may still be alive, Clarke, Bellamy, Octavia, Finn and Monty set out to locate him and are shocked at what they find.

Earth Skills

Clarke, Finn and Wells set out in search of an antibiotic to treat Jasper's wounds, when an acid fog forces them to seek shelter...and forgiveness for past crimes.

Earth Kills

Abby risks having herself floated in order to give Raven (recurring guest star LINDSEY MORGAN) the chance to stow-away in the escape pod bound for Earth.

Murphy's Law

After exposing Kane's plan to reduce the population of the Ark, Abby and  Chancellor Jaha notice a signal from Earth and realize at least some of the 100 must still be alive.

Twilight's Last Gleaming

While Bellamy leads his crew into Grounder territory in a search for Olivia, Raven can't help but notice the deep connection between Finn and Clarke.

His Sister's Keeper

While Clarke and Raven make contact with the Ark, Abby is removed from the council and Jaha reveals that there are not enough drop ships for everyone on the Ark.

Contents Under Pressure

While some of the 100 accidentally eat hallucinogenic nuts, Clarke and Bellamy go on a mission to find supplies for winter and are brought closer by a terrifying event.

Day Trip

All hell breaks loose when Clarke and Finn attempt to broker peace with the Grounders.  And tragedy strikes during the Unity Day celebration on the Ark.

Unity Day

Murphy returns to camp claiming to have been held captive and tortured by the Grounders, and Clarke and Bellamy have very different opinions on how to handle his return.

I Am Become Death

With a low food supply at camp, Clarke and Finn lead a group out to hunt for food and wind up with Finn's life in danger. Meanwhile, Raven makes Bellamy an offer he can't refuse.

The Calm

Should they stay or should they go:  Those remaining on the Ark must come to terms with the inevitable.  Meanwhile, Clarke and Finn find themselves facing a new enemy.

We Are Grounders - Part I

It's the end of the world as we know it in the first season finale as the conflict on the ground comes to a head and the situation on the Ark comes to a stunning conclusion.

We Are Grounders - Part II

Pluto

In the fifth season premiere, Clarke (ELIZA TAYLOR) struggles to survive on a desolate, scorched earth, while her friends in space come across a long-awaited beacon of hope.

Eden

Octavia (series star MARIE AVGEROPOULOS) is forced to take guidance from an unlikely ally when the future of the bunker and all those inside it is jeopardized.

Red Queen

Bellamy (BOB MORLEY) leads the charge investigating a potential way home.  Meanwhile, Clarke and Madi (LOLA FLANERY) deal with the new uncertain threat to their home.

Sleeping Giants

Our heroes are forced to rely on the help of Shallow Valley's dangerous new inhabitants in order to save some of their own – with surprising results.

Pandora's Box

Octavia leads her people toward Shallow Valley against the advice of Clarke & Bellamy. Meanwhile Kane (HENRY IAN CUSICK) and Abby (PAIGE TURCO) adjust to a new set of challenges.

Shifting Sands

Kane's attempt to prove himself useful tests Wonkru's allegiance to Octavia. Madi faces an unexpected threat inside Wonkru, forcing Clarke to make an unlikely ally.

Exit Wounds

Clarke and Bellamy make a startling discovery about Wonkru's battle plans as Echo (TASYA TELES) risks her friendship with Raven (LINDSEY MORGAN) to complete her mission.

Acceptable Losses

Clarke's determination to protect Madi puts Bellamy in an impossible situation.

How We Get To Peace

The growing fractures in Wonkru threaten to explode once and for all.  Meanwhile, in Shadow Valley, Murphy (RICHARD HARMON) starts a fire, unleashing catastrophic results.

Sic Semper Tyrannis

Monty strives to show Wonkru an alternative to war, and to the Valley itself.  Meanwhile, Abby's health continues to deteriorate, along with McCreary's patience.

The Warriors Will

As Clarke races to save Abby, she learns more about the trials and tribulations Wonkru faced in the bunker, and the impossible decisions they were forced to make in the dark year.

The Dark Year

In part one of the fifth season finale, Octavia leads her people into war.  While behind enemy lines, our heroes must overcome their differences to save Wonkru from extinction.

Damocles - Part One

In part two of the fifth season finale, Clarke and her friends must risk everything to fight one last battle for survival – only to glimpse an even darker threat to the last living valley on Earth.

Damocles - Part Two

After an exile in space, human survivors return to a wildly transformed Earth…only to discover that the human race never truly left. Staking out their place in this world, they face the peril and dilemmas that come with rebuilding society.

Eden

Full Episodes

Season 5, 13 episodes