Lives hang in the balance as the members of Station 19 continue to fight a raging inferno inside a skyscraper. Meanwhile, Pruitt's health is in grave danger at Grey Sloan; and a seasoned firefighter with a mysterious past arrives at Station 19, leaving everyone to wonder what the future holds.

Emily agrees to help Bill test her for the virus, but soon experiences serious side effects. Sacha, who has secretly followed the group to stay close to Emily, tries to remove her from the group. For their part, Catherine, Sophia and Nathan set out again in search of Bill Ward.

Catherine, Sophia, Zoe and the other survivors, finally reunited, prepare for the ultimate attack. But it is Bill who is the only one to hold the destiny of humanity in his hands, provided he is helped by Isla.

Oops! The wild story that explains why Terry had to order a new shot glass.

Oops! The wild story that explains why Terry had to order a new shot glass.

Finally! It's season finale time again! The Solars learn about death!

Catherine, Sophia, Zoe and the other survivors, finally reunited, prepare for the ultimate attack. But it is Bill who is the only one to hold the destiny of humanity in his hands, provided he is helped by Isla.

Richard, Jackson, April and Catherine tackle a grueling trauma case intensified by hospital politics. Amelia finally faces her feelings about Owen, and Meredith gets caught between Nathan and Alex over a patient.

Jackson and April travel to Montana in order to perform a complicated surgery on a young patient, but Jackson's mind is elsewhere, and April is forced to step up and get him back on track.

This is the show's first Halloween episode. Edie Britt's biggest fear comes true when Carlos walks out on their relationship. Susan finds Mike's father, who was supposedly dead. Danielle goes into labor right in the middle of the Halloween party... and somebody has to deliver the baby.

Lynette's sisters Lydia and Lucy come to visit. While having dinner with Susan and Mike, Bree and Orson realize they share different views on whether their newborn baby should be circumcised. On a boat, Victor confronts Gaby about her affair with Carlos and she throws him into the ocean. Later, Bree informs Susan that she thinks Mike is addicted to drugs.

When a police officer shows up to the ER with an injured criminal that he caught in the act, it's up to the Chastain staff to keep him alive in order to save an innocent life. Nic gets roped into a surgical rotation with Cain that leaves her questioning the way he operates, and Conrad makes a shocking discovery about the hospital. Meanwhile, Bell pursues a new fiscal venture that may bring him into a whole new market.

Richard, Jackson, April and Catherine tackle a grueling trauma case intensified by hospital politics. Amelia finally faces her feelings about Owen, and Meredith gets caught between Nathan and Alex over a patient.

Jackson and April travel to Montana in order to perform a complicated surgery on a young patient, but Jackson's mind is elsewhere, and April is forced to step up and get him back on track.

This is the show's first Halloween episode. Edie Britt's biggest fear comes true when Carlos walks out on their relationship. Susan finds Mike's father, who was supposedly dead. Danielle goes into labor right in the middle of the Halloween party... and somebody has to deliver the baby.

Lynette's sisters Lydia and Lucy come to visit. While having dinner with Susan and Mike, Bree and Orson realize they share different views on whether their newborn baby should be circumcised. On a boat, Victor confronts Gaby about her affair with Carlos and she throws him into the ocean. Later, Bree informs Susan that she thinks Mike is addicted to drugs.

The ghost of chef who died in a fire at a Chinese restaurant meets Melinda after the restaurant he died in burns for a second time. He demands that Melinda go out and find the person that really set the fire he was blamed for.

When Devon's patient, who was pronounced dead, suddenly revives, Conrad is left doubting Devon's judgement and wondering what happened. A well-known white supremacist falls under the care of Cain and Nic, causing the two to butt heads on how to move forward. Meanwhile, on their way to a medical convention, The Raptor and Mina get stuck in a strange town, where they uncover new information about Red Rock Medical.

Diane Pierce returns to Grey Sloan, but Maggie is still in the dark as to why she's really there. Owen and Amelia hash out their problems as they work a trauma case together, and Bailey tries to mend her relationship with Richard.

When Maggie's mom's health deteriorates, the doctors are at odds over how to treat her. Meanwhile, Richard comes to grips with Bailey's betrayal over the Residency Program.

A mysterious stalker from Adam's past shows up on Wisteria Lane, and they have dinner. Detectives question Gabrielle about Victor's whereabouts. Danielle's baby puts stress on Bree and Orson's marriage. Lynette has a reunion with her long-lost stepfather, Glen. Susan notices Mike is behaving strangely.

A tornado comes to Wisteria Lane, forcing residents into basements, cellars and safe rooms, and destroying homes and lives. Meanwhile, Susan ends up at the hospital after falling down the stairs.

Lives hang in the balance as the members of Station 19 continue to fight a raging inferno inside a skyscraper. Meanwhile, Pruitt's health is in grave danger at Grey Sloan; and a seasoned firefighter with a mysterious past arrives at Station 19, leaving everyone to wonder what the future holds.

The shooting death of a New York mobster's son creates a tense situation when the mobster threatens to find and kill the person responsible. Megan and the team must hurry to solve the case after one suspect is killed.

Megan and Tommy must separate out fact from fiction to determine if a child's murder was severe child abuse or something else.

The ghost of chef who died in a fire at a Chinese restaurant meets Melinda after the restaurant he died in burns for a second time. He demands that Melinda go out and find the person that really set the fire he was blamed for.

An investigation involving the murder of a local singer uncovers details that reopen a strikingly similar decades-old cold case. Later on, the team rallies around Soto after she is passed over for the captain’s chair.

The shooting death of a New York mobster's son creates a tense situation when the mobster threatens to find and kill the person responsible. Megan and the team must hurry to solve the case after one suspect is killed.

The ghost of chef who died in a fire at a Chinese restaurant meets Melinda after the restaurant he died in burns for a second time. He demands that Melinda go out and find the person that really set the fire he was blamed for.

Lives hang in the balance as the members of Station 19 continue to fight a raging inferno inside a skyscraper. Meanwhile, Pruitt's health is in grave danger at Grey Sloan; and a seasoned firefighter with a mysterious past arrives at Station 19, leaving everyone to wonder what the future holds.

A mysterious stalker from Adam's past shows up on Wisteria Lane, and they have dinner. Detectives question Gabrielle about Victor's whereabouts. Danielle's baby puts stress on Bree and Orson's marriage. Lynette has a reunion with her long-lost stepfather, Glen. Susan notices Mike is behaving strangely.

A tornado comes to Wisteria Lane, forcing residents into basements, cellars and safe rooms, and destroying homes and lives. Meanwhile, Susan ends up at the hospital after falling down the stairs.

When Maggie takes on a big case, many of the doctors are worried she's not the right one for the job while Stephanie makes a mistake treating one of Grey Sloan's own.

Meredith and Nathan have to confront their feelings when they are stuck sitting next to each other on a plane.

After a plane crashes in Atlanta, Devon is overcome by guilt at the thought that he could have prevented the tragedy. Bell, who was a passenger on the plane, makes it his personal mission to save the life of the man seated next to him. Meanwhile, Adaku returns to ask Mina a big favor, the Raptor struggles with telling his birth parents about meeting his biological father and Conrad and Nic consider risking it all to investigate a drug that might be linked to Jessie’s death.