Nicholas Stephen Tyrol is the son of Galen Tyrol and Cally Henderson. 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). His name is given, and he is dedicated to the service of Aries and Apollo, in "Battlestar Galactica: The Resistance, Part X".