Battlestar Galactica Codexery

Galen Tyrol

The Galactica's top non-com, keeping the fleet flying through crisis and betrayal.

Galen Tyrol (often called "Chief"), portrayed by Aaron Douglas, is the Galactica's highest-ranking non-commissioned officer and in charge of maintenance of the Vipers and Raptors. He has a secret relationship with Lieutenant Sharon "Boomer" Valerii. The revelation of her true identity as a Cylon plunges him into crisis. Tyrol later marries and starts a family with Cally Henderson, though it is later revealed that she had had an affair with Brendan Constanza and the child is his. On New Caprica, he is union leader and later one of the leaders of the human Resistance against the Cylon occupation. In the season three finale "Crossroads", Tyrol learns that he is one of the Final Five Cylons.

Role
Chief Petty Officer of Engineering
Affiliation
Colonial Fleet / Galactica
Rank
Chief Petty Officer (CPO)
Key Skill
Mechanical engineering and ship maintenance

Lore & Background

Screen Rant wrote that Tyrol stands out thanks to "complex relationship with Sharon Valerii and his quest for redemption", which "highlights the show's theme of breaking the cycle."

In Their Own Story

Tyrol's journey begins as the Galactica's highest-ranking non-commissioned officer, responsible for maintaining the ship's Vipers and Raptors. His secret relationship with Lieutenant Sharon "Boomer" Valerii shatters when she is revealed to be a Cylon sleeper agent. Later, he marries Cally Henderson and starts a family, only to learn that Cally had an affair with Brendan Constanza and the child is not his. On New Caprica, Tyrol becomes a union leader and a key figure in the human Resistance against the Cylon occupation. In the season three finale "Crossroads", he discovers he is one of the Final Five Cylons.

Reader's Guide

Galen Tyrol begins as the Galactica's chief non-commissioned officer, overseeing maintenance of the ship's fighter and support craft. His personal life is marked by a secret relationship with Lieutenant Sharon "Boomer" Valerii, which ends when her Cylon identity is exposed. He later marries deckhand Cally Henderson, but learns their child was fathered by Brendan Constanza during an affair. During the New Caprica occupation, Tyrol serves as a union leader and Resistance fighter. The season three finale reveals Tyrol is one of the Final Five Cylons, a revelation that redefines his entire arc.

Did You Know?

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