Emotional Rescue is the 10th episode of the fourth season .
In the second half of a two-part episode, Dr. Charlie Harris returns to Hope Zion Hospital to find Dr. Maggie Lin in jeopardy. In a race against time, Charlie struggles to find out what's wrong with his colleague and friend. Meanwhile, Dr. Alex Reid, who's still dealing with her part in treating the bomber, becomes determined to make amends by saving Maggie's last patient Shelby. Along with Dr. Sydney Katz, who returned to Hope Zion for the case, Alex must convince Shelby and her husband that letting go is sometimes the only thing standing in between you and getting better when complications threaten her leg. In the ER, Dr. Cassie Williams and Dr. Jeremy Bishop help a bereaved father deal with the death of his daughter.