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The 100 Wiki

Caleb Mason was a minor character in the sixth season. He was portrayed by Ian Butcher in his last host.

He was one of the Primes and a member of the Mason family.

Early Life

He was born on Earth, and at some point, his family was summoned to participate in the colonization of Alpha. Later, he arrives with his family on Alpha. 21 days later, Russell Lightbourne is affected by the Red Sun toxin, during the eclipse and kills Caleb, by shooting him in the chest, before killing Miranda and Jasmine, who were hiding in the bushes. He and his family were later resurrected by Russell and Gabriel Santiago.

Throughout the Series

In Red Sun Rising, Caleb was seen with the Mission Team Alpha when Russell Lightbourne is affected by the Red Sun toxin, during the eclipse, as he shoots him in the chest.

In Adjustment Protocol, Caleb is resurrected in the body of a Sanctum Guard named Bryson. Murphy and Emori meets with him and his family, who are also resurrected as well. During the chaos in Sanctum, Caleb and the other Primes, along with Sanctum Guards, were forced to evacuate to Eligius IV with Clarke's friends as prisoners. The Primes are unware that "Josephine Lightbourne" is actually Clarke Griffin in disguise.

In The Blood of Sanctum, after the Primes take over Eligius IV, Caleb was present there when Russell plans to head towards Planet Beta for a new home. However, Caleb was unsure if it's survivable, but Russell says that if it isn't, he plans to go to Planet Gamma, Delta, and Epsilon. Later, Caleb and the other Primes begin hunting down Clarke, who revealed herself to Russell and Simone Lightbourne. After finding Clarke, who orders them to drop weapons, Simone pretends to be Abigail Griffin, in order to trick Clarke into luring her as Simone shoots her gun, forcing Caleb and the other Primes to surrender. When Clarke discovers Simone's lies, she angrily floats Caleb and the other Primes, including Simone, into space. Caleb's body was seen floating in space as he is now officially dead, although his Mind Drive has held, he is dormant, but his mind drive cannot be recovered.


Physical Appearance

He was born of African ancestry and had brown skin and black hair. His 7th host was a white man with blue eyes and bald head.


Miranda Mason

Miranda was Caleb's wife.

Jasmine Mason

Jasmine was Caleb's daughter.


Season Six
Episode Appearance Status
Red Sun RisingFlashback
The Children of GabrielMentioned
The Face Behind the GlassAbsent
The Gospel of JosephineAbsent
Memento MoriAbsent
The Old Man and the AnomalyAbsent
What You Take With YouAbsent
Ashes to AshesAbsent
Adjustment ProtocolAppears
The Blood of SanctumAppears
Season Seven
Episode Appearance Status
From the AshesMentioned
The GardenAbsent
False GodsAbsent
Welcome to BardoAbsent
The Queen's GambitAbsent
The FlockAbsent
A Little SacrificeAbsent
The StrangerAbsent
Blood GiantAbsent
A Sort of HomecomingAbsent
The Dying of the LightAbsent
The Last WarAbsent


Russell, we don't even know if it's survivable.
-- The Blood of Sanctum

Notes and Trivia

  • it is not known whether Caleb Mason, knew about Miranda Mason having a lover.