When Bell makes the executive call to utilize Julian Booth's medical devices, rather than the hospital's usual products, Kit and AJ must stop their momentary feuding in order to team up against him. Elsewhere in the hospital, Conrad and Nic work to make a child's dreams come true after finding out his cancer has returned and the rest of the staff takes notice of Julian and Devon's new friendship.

Cracks start to show as the survivors find different ways to cope. Jonathan’s increasingly perturbed by Sacha’s strange behaviour. Emily proves to be an exciting conundrum for Bill. And Mokrani is horrified as his men delight in the opportunity to exact revenge.

The alien’s connection to certain survivors raises difficult questions. Bill makes a startling discovery. Sacha’s behaviour is increasingly erratic. And Tom’s birthday proves cause for celebration. But at what cost?

Far out! Korvo and Terry manipulate each other with time travel while Yumyulack grows a fat hog.

Super villain M.O.D.O.K. runs his evil organization AIM into the ground and is forced to sell it to the tech company GRUMBL. As the megalomaniacal M.O.D.O.K. struggles to regain control of AIM, he risks losing something even more important…his family!

As people across the globe are experiencing hallucinations, MI5 agent Zoe contacts Bill for answers; Catherine Durand detects unusual black hole activity.

As Adina starts the next stage of her plan, astronauts Juliet and Richard see warning signs in space; uncovering Adina's sinister mission.

With Richard's help, Catherine discovers she can travel to another world; a new revelation puts Martha's loyalties to the test; Zoe breaks Bill out of prison.

When Bell makes the executive call to utilize Julian Booth's medical devices, rather than the hospital's usual products, Kit and AJ must stop their momentary feuding in order to team up against him. Elsewhere in the hospital, Conrad and Nic work to make a child's dreams come true after finding out his cancer has returned and the rest of the staff takes notice of Julian and Devon's new friendship.

Halloween at Chastain proves to be just as spooky as ever when Conrad is tasked with diagnosing a young woman admitted to the hospital with extreme night terrors. Meanwhile, Devon faces his first Halloween in the ER, Nic panics over her decision to bring her newly sober sister to Mina's epic annual Halloween party and Bell finds an interesting way to make use of his new assistant.

Teddy and Owen plan a date night that gets derailed in more ways than one; Jo struggles to do it all at home; Mika adds more to her plate to make up for taking time off to be with her sister; Levi is faced with a monumental decision.

The doctors must put aside their emotions under intense circumstances; Levi asks James a shocking question that could impact their future.

In the midst of a deadly heat wave, the team at Grey Sloan struggles to keep up with an overwhelming amount of patients; Amelia and Winston face a challenging surgery; Jo and Lucas run an errand for the hospital that takes an unexpected turn.

The aftermath of the convenience store shooting brings chaos to Grey Sloan; Ben hits a wall with his new emergency preparedness plan; romantic tensions surface for Owen; Amelia and Winston disagree over the surgical plan for a young patient.

Station 19 and Station 23 each attempt to celebrate Thanksgiving following the fallout from the neighborhood explosion. The firefighters come together to cook, toast to loved ones they have lost, and celebrate the families they have become.

Vic and Jack lean on one another as they process the loss of Dean while Ben and Bailey try to convince Dean's parents to allow them to raise Pru. Meanwhile at Station 23, Andy's role temporarily expands and Sullivan subs in. Carina and Maya explore growing their family.

It's the most wonderful time of the year and the firefighters have their hands full responding to a number of crises throughout Seattle. Putting aside their differences and personal drama, they come together to try and achieve a Christmas miracle.

Susan tries bravely to accept Edie’s new role in Julie’s life, while Lynette’s demanding boss makes her miss Parker’s first day of kindergarten. Bree later on takes a polygraph test to prove her innocence in Rex's death and realizes she has feelings for George. Gabrielle finally comes to the truth about Carlos and John after seeing John with another woman.

On one of Gabrielle's prison visits to see Carlos she creates a terrible riot, which lands Carlos in hot water. Also, Susan puts her feelings aside and joins Mike in searching for his son Zach. Lynette is surprised to find out that her son Parker has an imaginary friend. Lastly, George and Andrew both vie for Bree's attention as they both compete in making each other look bad in front of her, until one fight goes a little too far.

Megan investigates the death of a young nanny run down by a car and discovers that her 5-year-old charge has been kidnapped -- and requires medication. A handsome FBI agent, Derek Ames, is assigned to the case.

Diane returns to help with Crisis One intervention training for Station 19 and Station 23 firefighters. Andy and Sullivan continue to be at odds. Jack helps a young autistic man on a city bus.

When Theo and Vic hit a relationship milestone, Vic is forced to reckon with her feelings about commitment. Andy takes refuge at Dean's home and helps care for Pruitt, while Dean considers a new potential career opportunity. Meanwhile, an explosion rips apart a neighborhood and changes the lives of our firefighters forever..

When a car careens out of control over an embankment, killing a middle-aged man in the driver's seat, Megan learns that all is not well on a pretty suburban cul-de-sac.

When a wealthy tycoon's much younger new wife, Julie Loeb, is shot at a family deer-hunting outing, suspects abound. The tycoon, Martin Loeb, is such a likely suspect that Megan openly accuses him and is fired from the case by Kate, at the request of the highly-influential Martin.

Megan investigates the death of a young nanny run down by a car and discovers that her 5-year-old charge has been kidnapped -- and requires medication. A handsome FBI agent, Derek Ames, is assigned to the case.

The FBI joins the investigation into the murder of a controversial tech magnate, forcing Karadec to reunite with his former partner; Ludo becomes overwhelmed with his increasing childcare duties.

The hunt for a counterfeit currency kingpin allows the team to get a glimpse into Villa’s past. Meanwhile, Rosie receives surprising news about his recent health issue.

A Station 19 firefighter lands in the emergency room for severe burn treatment; the team treats an elderly patient impaled by an art structure.

Meredith and Nick return to Grey Sloan to treat a liver transplant patient; Bailey hosts an intern retreat at her home; Winston and Ben aid an unexpected crash victim.

Following a difficult case, the team faces the complexities of medical ethics; Bailey continues to navigate her working relationship with Ben; a group of college students on a scavenger hunt causes chaos around the hospital.

Gabrielle kisses Tom and Lynette is not happy and drives a wedge in her friendship with Gabrielle. Paul attacks Mike. The housewives become more suspicious of Betty and her family. Andrew is trying to blackmail Bree, but Bree gets some assistance from Susan's ex, Karl.

Amelia and Simone attempt to perform a high-stakes and groundbreaking brain surgery; Teddy and Bailey attend a medical conference and run into Dr. Cass Beckman; Jo struggles with her irritation toward a younger OB-GYN.

Bailey welcomes a renowned surgeon, whom she greatly admires, to Grey Sloan to help on a challenging case; Teddy, Owen, Jules and Ben team up to save the life of a patient who has been impaled by an ice pick.

When patients from the hospital's prescription drug trial start suffering life threatening side effects, Nic fears that her sister Jessie may be in danger. As a result, she and Conrad work to convince Bell that these trials are not worth the risk. Meanwhile, Mina, Austin and Kit must set aside their competitive nature and work together on a patient whose health is quickly deteriorating and Devon uses Julian as the beta tester for a product he's designed.