Nicholas Tyrol

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Nicholas Tyrol
Nicholas Tyrol


Colony New Caprica
Birth place {{{birthplace}}}
Birth Name Nicholas Stephen Tyrol
Birth Date {{{birthdate}}}
Callsign {{{callsign}}}
Nickname Nicky
Introduced Battlestar Galactica: The Resistance, Part I
Parents Galen Tyrol (nominal father)
Cally Tyrol (mother) †
Brendan "Hot Dog" Costanza (biological father)
Children {{{children}}}
Marital Status {{{marital status}}}
Family Tree View
Role {{{role}}}
Rank {{{rank}}}
Serial Number {{{serial}}}
Portrayed by Finn R. Devitt
Nicholas Tyrol is a Cylon
Nicholas Tyrol is a Final Five Cylon
Nicholas Tyrol is a Human/Cylon Hybrid
Nicholas Tyrol is an Original Series Cylon
Additional Information
Nicholas Tyrol in the separate continuity
[[Image:|200px|Nicholas Tyrol]]

Nicholas Stephen Tyrol is the infant son of Cally and Galen Tyrol. His biological father is later revealed to have been Brendan Costanza.

He was born some time between the end of "Lay Down Your Burdens, Part II" (c. day 680) and "Battlestar Galactica: The Resistance, Part I" (c. day 727), and is dedicated to the service of Ares and Apollo (Battlestar Galactica: The Resistance, Part X).

Chief Tyrol tells Sharon Agathon that Nicholas is named after Cally's grandfather (Exodus, Part I).

When Cally finds out that her husband is a Cylon, she attempts to kill herself and her son. However, Tory Foster, under the guise of dissuading her from her actions, takes Nicholas into her arms, only to space Cally herself (The Ties That Bind).

He was originally thought to be a Cylon/human hybrid[1], because his father Galen Tyrol is a type of Cylon (Crossroads, Part II).

Following the days after they leave Earth, Galen Tyrol rushes into sickbay with Nicholas telling them he is "peeing blood" (A Disquiet Follows My Soul). Nurse Ishay and Dr. Cottle inform Galen Tyrol that his son is suffering from early renal failure but that treatment should prevent a damaged kidney. Things get more complicated when Tyrol corrects the medical team that his child is half-Cylon, and requires half-Cylon blood not human blood. Ishay tries to tell Cottle to inform Tyrol of something important only to be dismissed by Cottle. Cottle then proceeds to tell Tyrol privately that his late wife, Cally Tyrol, hid a secret: little Nicky is not Galen's biological child. When Tyrol asks who the father is, Cottle angrily declines that request until he can tell the birth father himself. Later Galen Tyrol and the biological father Brendan Costanza erupt into a fist fight at one of Baltar's services.

Later back in sickbay Nicholas is asleep in a hospital bed while Tyrol instructs Constanza on the very basics of being a father, then turns and leaves him to tend to his son. When Costanza asks how long he must sit at Nicky's bedside, Tyrol answers, "Until I get back. That'll be after I sober up."

Nicholas is with his father, Brendan when Brendan collects the pictures off of Galactica's Memorial Wall and explains about it to Admiral Adama.


  • Nicholas Tyrol was named after producer David Weddle's maternal grandfather.[2] He shares his nickname, 'Nicky' with actress Nicki Clyne who portrayed his mother.


  1. Podcast: Frak Party Q and A , Seek to: 22:41. Total running time: 78:27.
  2. Bassom, David (2007). Cath Trechman Battlestar Galactica: The Official Companion Season Three. Titan Books. ISBN 1-84576-478-1, p. 36.