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Maggie Campbell (née Lockwood) is a charge nurse in the Emergency Department at Gaffney Chicago Medical Center. She is portrayed by Marlyne Barrett.


Maggie's mother was a midwife, and she grew up around medical settings. When she was 16, Maggie got pregnant and gave up her daughter (Vanessa Taylor), viewing herself unfitted to be a parent but she slowly regretted her choice over the twenty years that followed.


She has a sister, Denise Lockwood, and another unnamed sibling.

She once took her niece to a Justin Bieber concert. She has a cousin who is a contractor.


Maggie is extremely dedicated to her job and loyal to those who work under her, but she runs the department with a no-nonsense attitude.

Season 1


Maggie coordinates the treatment of an influx of victims from an elevated train derailment. At the end of the episode, she and April are seen putting together a crib for their pregnant widow colleague Natalie.


An injured drunk driver is brought into the ED, along with the police officer he hit. The partner of the police officer demands Dr. Rhodes draw a blood-alcohol sample before he goes up to surgery. Connor asks for the patient's consent as per hospital policy, but he refuses. Maggie tells the officer that they are in the business of saving lives and Connor takes the patient up to surgery. The police officer then places Maggie under arrest for obstruction of justice.

Later, Maggie is released on bail and Connor picks her up. In the car they discuss how the justice system is unfair.

Season 2

Natural History

Maggie's sister Denise briefly loses her vision and has a car accident. Dr. Halstead informs her that she has prostate cancer, revealing that Denise is a transgender woman and that she elected not to have her prostate removed.

Denise and Maggie bond during the episode and work through some of their issues. Maggie misses her brother but accepts Denise the way she is now.

Mirror Mirror

The officer who arrested her in Guilty is brought in with severe injuries. Maggie is cautious over her approach, especially as the officer's husband and other police officers do not want her near her after the arrest. Trudy Platt asks Ms. Goowin to keep Maggie away. However, Maggie refuses, saying that she won't let this interfere with how she works but April ultimately takes over. As an organ donor, the officer is kept on life support until the compatible recipients are found. The husband eventually shows up before his wife is taken to surgery and taken off life support with a necklace that belonged to her, Maggie tells him he can stay with his wife through surgery. Maggie convinces Goodwin and the patient's husband to let her back on her case, so she can get closure.

Season 3

Season 4

Season 5

Never Going Back To Normal

Following donation of her kidney to a woman who then developed cancer, Maggie gets a mammogram and learns that she has metastatic adenocarcinoma. She needs further tests to see where the cancer has spread to, as well as a lumpectomy with chemo and/or radiation, or else a mastectomy.

We're Lost In The Dark

Maggie has her first round of chemotherapy at East Mercy. She returns to work, explaining away her absence as a vacation. She guides the fire department paramedics who are called in after a power outage and re-organizes patients already in the ED. Sharon advises her to pace herself. When Will orders one of his patients to be isolated because of a possible infectious disease, Sharon orders her to remove herself from the case due to her being immunocompromised from her chemotherapy, but she refuses. She eventually becomes unwell from overstretching herself, but is able to recover.

In the Valley of the Shadows

Maggie continues to push herself beyond her limit and takes it out on her new pupil Paula who has been assigned to shadow her. Paula is eventually driven to quit, and after pressure from Goodwin she decides to start training April as her second in command. Sharon also convinces her to continue her cancer treatment at Gaffney, saying she will receive better care than at East Mercy.

Infection: Part II

Maggie is sent home by Sharon, who does not want her around when multiple patients suffering from the flesh-eating bacteria are brought in due to Maggie being immunocompromised.

Got a Friend in Me

Maggie has started to lose her hair due to her chemotherapy and starts to wear a wig. When she is discovered in the chemotherapy ward by CeCe she is initially displeased, but CeCe convinces her to share her condition with her colleagues. Outside the hospital, she removes her wig in front of April, Doris and Monique, revealing her balding head.

Season 6

When Did We Begin to Change

Maggie coordinates the treatment of COVID and non-COVID patients in the ED.

Those Things Hidden in Plain Sight

Maggie consoles Will when he is passed over for the position of head of the ED in favor of Ethan.

Do You Know the Way Home?

Maggie attempts to reign in Will when he becomes overly eager to enroll his patient in his new clinical trial.

Season 7

You Can't Always Trust What You See

Maggie joins Goodwin and the rest of the ED staff in welcoming back Dr. Halstead. She continues to struggle with having to keep her distance from Vanessa. She breaks her rule when she comforts Vanessa after her first time pronouncing a patient dead.

Notes and Trivia

Memorable Quotes

  • (to Connor): "Nothing happens in my kingdom that I don't take responsibility for."



Season 1
Derailed iNO Fallback Mistaken Malignant
Bound Saints Reunion Choices Clarity
Intervention Guilty Us Hearts Inheritance
Disorder Withdrawal Timing
Season 2
Soul Care Win Loss Natural History Brother's Keeper Extreme Measures
Alternative Medicine Inherent Bias Free Will Uncharted Territory Heart Matters
Graveyard Shift Mirror Mirror Theseus' Ship Cold Front Lose Yourself
Prisoner's Dilemma Monday Mourning Lesson Learned Ctrl Alt Generation Gap
Deliver Us White Butterflies Love Hurts
Season 3
Speak Your Truth Nothing to Fear Trust Your Gut Naughty or Nice Mountains and Molehills
Ties That Bind Over Troubled Water Lemons and Lemonade On Shaky Ground Down By Law
Folie à Deux Born This Way Best Laid Plans Lock It Down Devil in Disguise
An Inconvenient Truth The Parent Trap This Is Now Crisis of Confidence The Tipping Point
Season 4
Be My Better Half When to Let Go Heavy Is the Head Backed Against the Wall What You Don't Know
Lesser of Two Evils The Poison Inside Us Play by My Rules Death Do Us Part All the Lonely People
Who Can You Trust The Things We Do Ghosts in the Attic Can't Unring That Bell We Hold These Truths
Old Flames, New Sparks The Space Between Us Tell Me the Truth Never Let You Go More Harm Than Good
Forever Hold Your Peace With a Brave Heart
Season 5
Never Going Back to Normal We're Lost in the Dark In the Valley of the Shadows Infection, Part II Got a Friend in Me
It's All in the Family Who Knows What Tomorrow Brings Too Close to the Sun I Can’t Imagine the Future Guess It Doesn't Matter Anymore
The Ground Shifts Beneath Us Leave the Choice to Solomon Pain Is for the Living It May Not Be Forever I Will Do No Harm
Who Should Be the Judge The Ghosts of the Past In the Name of Love Just a River in Egypt A Needle in the Heart
Season 6
When Did We Begin to Change Those Things Hidden in Plain Sight Do You Know the Way Home? In Search of Forgiveness, Not Permission When Your Heart Rules Your Head
Don't Want to Face This Now Better Is the Enemy of Good Fathers and Mothers, Daughters and Sons For the Want of a Nail So Many Things We've Kept Buried
Letting Go Only to Come Together Some Things Are Worth the Risk What a Tangled Web We Weave A Red Pill, a Blue Pill Stories, Secrets, Half-Truths and Lies
I Will Come to Save You
Season 7
You Can't Always Trust What You See To Lean In, or To Let Go Be the Change You Want to See Status Quo, aka the Mess We're In Change Is a Tough Pill to Swallow
When You're a Hammer, Everything's a Nail A Square Peg in a Round Hole Just as a Snake Sheds Its Skin Secret Santa Has a Gift For You No Good Deed Goes Unpunished... in Chicago
The Things We Thought We Left Behind What You Don't Know Can't Hurt You Reality Leaves a Lot to the Imagination