Max and Sharpe wake up to a new, more personal dynamic. Iggy calls upon an old contact to help with an explosive situation at the hospital. Bloom begins a tricky dynamic with her new Emergency Department residents. Reynolds finds himself in an awkward position with Dr. Baptiste and his wife, Dr. Lyn Malvo.

Max is faced with a wrenching decision when New Amsterdam falls prey to a massive ransomware attack.

Max takes drastic measures to help several undocumented immigrants after a fire destroys the church where had sought refuge; Sharpe and Malvo assist a patient with a life threatening condition; Reynolds is conflicted about his new position.

As Max and Dr. Sharpe prepare to depart for London, a deadly superbug hits the hospital and draws them back in. Leyla confronts Bloom about the secret she has been hiding. Iggy digs deep to help two grieving parents confront the reality that their son is gone.

Max and Helen settle happily into their new life in London. Dr. Fuentes takes over as medical director with disastrous effects. Bloom helps a patient who thinks he’s cursed. Iggy develops a plan to get his psych patients gainfully employed.

Max and Helen adjust to sharing their lives and problems, including the challenge of Helen's mother. Bloom and Reynolds treat a family after their horrific car accident lands them in the ED. Iggy and Trevor reach a new understanding in their business relationship.

As the team gathers to mourn the loss of someone dear, Max and Helen realize the extent to which New Amsterdam has changed since they left. Bloom struggles with a big decision while Reynolds decides to take his concerns for his patients to a new level. Dr. Fuentes once again reminds the New Amsterdam team who is in control.

Max formulates a bold plan to help New Amsterdam before it’s too late. Reynolds and Dr. Fuentes fight over the best way to handle a risky surgery. Dr. Wilder asks Dr. Castries for help with a patient with terminal cancer. Iggy helps a father and son deal with vastly different views on a shared trauma.

The New Amsterdam team continues to deal with the consequences of their big night out. Max and Helen discuss options for their future. Martin finally learns Iggy's secret. Bloom helps Leyla avoid a life-changing situation. Reynolds and Dr. Malvo define their relationship going forward.

Max discovers the extent to which Dr. Fuentes' cuts are severely damaging New Amsterdam and decides it's now or never. Iggy takes an unconventional approach to reach a young patient in need. Reynolds and Wilder perform a risky, life-saving surgery on unborn twins.

When an elder care facilitate shuts down, New Amsterdam is forced to intake many new patients. Max struggles with his decision to head back to London. Reynolds takes his personal frustrations out on his department with near disastrous results. Iggy's work causes him to reflect on his marriage and personal life.

As a monster hurricane approaches New York, Bloom and the team scramble to put preparations in place. Max and Helen make plans for an intimate New York wedding as she returns from London. Iggy and Martin reach a crossroads. Reynolds finally makes contact with his father.

An explosion at a wedding ceremony sends a stream of injured partygoers into New Amsterdam. While Max and Dr. Wilder scramble to find a rare blood type to save the groom, Reynolds and Bloom treat a couple with bizarre injuries. While helping a young girl out of a catatonic state, Iggy learns the truth about the wedding.

Max mandates a personal health day for the staff at New Amsterdam and meets with surprising resistance. Reynolds finds himself intrigued by a persuasive new member of the staff. Bloom struggles with job stress after being taken off an essential medication. Iggy goes on his first date. Max convinces Wilder to get much needed surgery.

Max goes on a mission to make New York safer. Iggy helps a family come to terms with their deaf child’s inability to communicate.

Max discovers a revenue-generating department at the hospital that has serious legal implications. Iggy discovers a janitor with otherworldly talents. Reynolds treats a truly inspirational patient and makes plans for his father. Wilder's young patient teaches her not to jump to conclusions in diagnosing.

Reynolds gets creative to help a prospective mother in need. Max takes a chance with Wilder and learns a hard truth. Bloom treats a young brother and sister in dire straits. Iggy reaches a decision about Martin.