James Tiberius Kirk was born in Riverside, Iowa, on March 22, 2233, where he was raised by his parents, George and Winona Kirk. Although born on Earth, Kirk lived for a time on Tarsus IV, where he was one of nine surviving witnesses to the massacre of 4,000 colonists by Kodos the Executioner. James Kirk's brother, George Samuel Kirk, is first mentioned in "What Are Little Girls Made Of?" and introduced and killed in "Operation: Annihilate!", leaving behind three children.