The 100 (2014– )
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Blood Must Have Blood: Part 1 

As the Grounder army prepare to attack Mount Weather, a desperate Cage turns to Dante for help, and Raven and Wick experience a major setback.



(developed by), (based upon the book by) | 2 more credits »

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Episode cast overview, first billed only:
... Clarke Griffin
... Dr. Abigail Griffin (credit only)
... Bellamy Blake
... Octavia Blake
... Jasper Jordan
... Raven Reyes
... Lincoln
... Monty Green
... Marcus Kane (credit only)
... Thelonious Jaha (credit only)
... President Dante Wallace
... Cage Wallace
... Lexa
... Indra
... Maya Vie


Clarke and Lexa prepare for battle, while Raven and Wick experience a major setback.Octavia and Lincoln are each forced to make a difficult decision. At Mount Weather, Jasper and Maya witness a horrible act, Bellamy follows through on a promise and Cage goes public with powerful information.

Plot Summary | Add Synopsis

Plot Keywords:

friendly fire | See All (1) »


Drama | Mystery | Sci-Fi


TV-14 | See all certifications »



Release Date:

4 March 2015 (USA)  »

Filming Locations:

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Technical Specs


Sound Mix:


Aspect Ratio:

16:9 HD
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Did You Know?


When Bellamy enters the room where the prisoners are being held at the end of the Mine shaft, He sees that all the cages have been unlocked and opened and the prisoners released. The camera pans back and up giving a view of all the vacant cages on different levels of the room. You can note a few cages hanging from the ceiling roughly 15 to 35 feet from the ground,that are unlocked (Chains and Locks visible and hanging) and opened. These cages have no clear path to them, neither from climbing or catwalk, as they are hanging in the center of the room. Any captives that were somehow released, Would have suffered severe injury or even death, with the impact to the concrete floor. The room was completely empty except for Maya's deceased father, when they arrived. See more »


[first lines]
Bellamy Blake: [unlocking Echo's cage] Get up, it's time to go! I told you I'd come back for you.
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User Reviews

Talking about surprises...
10 February 2016 | by See all my reviews

That "The 100", even if it had its share of shortcomings, didn't seem to take the easy way, was easy to see from early on. Jaha's son's death at the beginning of the series, or Finn's one in the middle of the second season showed that "The 100" was not afraid of taking decisions, even if they were the wrong ones.

For some viewers, what happens in this episode will leave them baffled and/or angry. Because it's not what one expects of the showdown between the Ark-Grounders vs Mount Weather. Is it a good decision? Let's see. For now it's more than a worthwhile one.

"The 100" falls on one of the problems that serialized series usually have: the need to keep things going. So it takes a cheap decision. Not bad, but cheap. It has taken a couple from the beginning till now. But this one is probably the biggest.

The episode is centered around the last big battle, with the Mount Weather surrounded, with four teams against them (taking into account man-army Bellamy on the inside, who is supposed to get the caged Grounders on his side). Both groups will try to do anything but anything for theirs, and save their lives. It does for good TV, and as said above, for a strange twist, that, nonetheless, makes sense. The atmosphere is great, the action restless, and the characters all have their moments.

It's uneven, and rushed, but not a bad episode. It's surprising, and gut-wrenching, and nail-biting, that's for sure, and that makes for any shortcomings it may have.

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