Three Birds and a Baby (S01E04)

Helena finds an abandoned baby boy and takes him to the Clocktower, where Barbara and Dinah step in to assist. Shockingly, the baby, named Guy, only feels secure when Helena is near. The situation takes an even stranger turn when Guy suddenly wakes up as a walking, talking five-year-old, quickly evolving into a teenager. The Birds of Prey soon realize they are racing against the clock, as Guy is designed to live his entire life within three days, and he's destined to kill the first person he forms a bond with, putting Helena at serious risk.