Three Birds and a Baby - S1.E4

When Helena rescues an abandoned baby boy and brings him back to the Clocktower, Barbara and Dinah try to help, but to everyone's surprise, the baby, Guy, is only happy when Helena is holding him. Even more surprising is the fact that Guy wakes up from his nap as a walking, talking 5-year-old and is soon a teenager. Now in a race against time, the Birds of Prey discover that Guy is programmed to live his entire life in three days, and to kill the first person he attaches to, putting Helena in grave danger.