Heartbeat

An ethical debate begins after Alex suggests performing some risky surgery on conjoined twins that have been diagnosed with cancer.

Alex and Pierce are at odds about whether the hospital should provide an experimental treatment for patients with advanced-stage cancer. In other events, Max wants to change the family dynamic with Alex and Ji Sung connects with Callahan.

A case brings back memories for Alex, Jesse and Millicent as they fight to save a heart transplant patient when she sustains devastating injuries in a car crash.

When Alexs father needs a new kidney, an unlikely donor emerges and family secrets threaten to destroy the close relationship between father and daughter.

In the Season 1 finale, a mysterious illness sends the hospital into lockdown; and leaves Alex fighting to save the lives of Jesse, Pierce and Ji-Sung. In other events, Millicent deals with the consequences when Alex disobeys the CDC; and an elderly mans search for his missing wife causes Alex to make a major decision about her love life.