The 100 (2014– )
1 user 7 critic

Survival of the Fittest 

Clarke and Lexa encounter a new enemy. Bellamy and Lincoln work together to break into Mount Weather. Murphy helps Jaha confront his past. Indra makes Octavia an offer she can't refuse.


Dean White


Jason Rothenberg (developed by), Kass Morgan (based upon the book by) | 1 more credit »

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Episode cast overview, first billed only:
Eliza Taylor ... Clarke Griffin
Paige Turco ... Dr. Abigail Griffin (credit only)
Bob Morley ... Bellamy Blake
Marie Avgeropoulos ... Octavia Blake
Devon Bostick ... Jasper Jordan (credit only)
Lindsey Morgan ... Raven Reyes (credit only)
Ricky Whittle ... Lincoln
Christopher Larkin ... Monty Green (credit only)
Isaiah Washington ... Thelonious Jaha
Henry Ian Cusick ... Marcus Kane
Richard Harmon ... John Murphy
Alycia Debnam-Carey ... Lexa
Adina Porter ... Indra
Kendall Cross Kendall Cross ... Major Byrne
Rekha Sharma ... Dr. Lorelei Tsing


Clarke and Lexa encounter a new enemy. Bellamy and Lincoln work together to break into Mount Weather. Murphy helps Jaha confront his past. Indra makes Octavia an offer she can't refuse.

Plot Summary | Add Synopsis


Drama | Mystery | Sci-Fi


TV-14 | See all certifications »




Release Date:

28 January 2015 (USA) See more »

Filming Locations:

British Columbia, Canada

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


Clarke and Lexa lock themselves in the cage to hide from the gorilla which is a second door between them and the gorilla. When starts pounding on the door of the cage itself, Clarke says 'It found us' but it already knew where they were, and where they hid was the only other place to be in the enclosure. See more »


[first lines]
Bellamy Blake: Okay, we make it to the intake door without any of the real Reapers seeing us. What happens then?
Lincoln: We kill everyone.
See more »


References RoboCop (1987) See more »

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User Reviews

9 February 2016 | by tenshi_ippikiookamiSee all my reviews

Born from fear. "Survival of the Fittest" is really about hate. And fear. Grounders, Ark-people, Mount Weather people, it's all about their survival, so fear from dying becomes hate, and hate makes them take stupid decisions.

Grounders and Ark people keep walking a tightrope, everything on the line. Fear of losing power, hate about past slights, makes one or two situations go further than they should. Darkness keeps permeating everything around them, and so, the feeling of dread is high. In that respect, this episode is another good one.

But the show is not playing it safe, so it decides to expand on two more story lines. Lincoln and Bellamy's plan to enter Mount Weather is fraught with danger. Will they be able to get inside? How can they get through without being discovered? Is this the start of a beautiful friendship? This one(two)man-mission by Bellamy is nicely done, and it teases us which much more to come if he gets inside the complex.

Talking about beautiful friendships... Jaha keeps his path to become a prophet, and harbors an interesting obsession about bringing his people to the magnificent City of Light. On this religious trip he decides Murphy would be a nice partner. Jaha is showing all the signs of one who believes he has a call, talking about god and being a leader, etc etc. This new strand is also an interesting one, which may further the world of "The 100" and stress the religious aspect, which till now has been kept on a tight leash. Religion and sci-fi make for interesting partners, so lets see if they explore it further.

For now, all this plot development makes for an interesting second season episode.

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