S4E16 - "My Brother's Keeper"

This week, Doyle gives us proof of life, Mark tries to track Cynthia down to return her luggage, Corday and Benton go on a museum date, Doug treats an abused and poisoned boy, Carter and his family are in shock after Chase overdoses, Anna picks a fight with a neurosurgeon, and Jeanie does her best to care for Scott as he continues to get sicker.