On Chen and West's final day as rookies, the department races against the clock when a newborn is reported kidnapped from the hospital. Nolan and Harper do a ride-along with his psychology professor Fiona Ryan, who prepares a book about police reform. Lopez rides with West on his final day as a rookie, contemplating her future as a parent, reassures by West and advised by Harper during the search. The prime suspect, baby's father, is found after crashing his car, but he never took the baby. CCTV at the hospital reveal that Rita Cissane kidnapped the baby after her own died of SIDS and is found her on a bridge with the baby- Nolan and Lopez convince her to return the baby. Tim duly has mixed feelings about arrogant Chen and her bucket list, especially the intent to become an undercover agent while lucking ruthlessness. As Chen and West celebrate their last day as rookies, Harper invites Nolan for a home dinner with her and her daughter.
—KGF Vissers