This article is about the Whisperer in the TV Series. You may be looking for the Terminus resident or her Comic Series counterpart.
"Stop it! Your head's in the clouds again. He'll see that you're not committed to the cause. To her. (...) Should have left you behind when I had the chance..."
—Mary to Frances.[src]

Mary, better known as "Gamma", is an antagonist and a survivor of the outbreak in AMC's The Walking Dead. She is the sister of Frances and the aunt of Adam Sutton. After saving Alpha's life to prove her loyalty, Mary becomes the third-in-command of the Whisperers.


Mary is shown to be a selfish, cruel and psychopathic young woman who appears to be dedicated to the Whisperer way of life and completely loyal to her leader, Alpha. She is shown to be very cunning and a valuable member of the group due to her ability to sniff out key locations for the walkers in order to accumulate large hordes. Her dedication to the Whisperers is so strong that she put the well-being of her own family aside in order to focus on increasing and maintaining her standing in the group. Her selfishness is evident as she showed absolutely no concern or remorse for her younger sister, Frances', suffering over having to abandon her son and Mary's nephew to the walkers on Alpha's orders and even claimed she should have left Frances for dead when her remorse threatened their place in the group, showing she is willing to do anything to maintain her position in the group.

She is shown to be very capable of cold-blooded murder as seen when she fed her own sister alive to a group of walkers in order to protect Alpha, showing Mary's decent into a primitive, hardened survivor completely loyalty to the animalistic way of life of the Whisperers. Her actions and cruelty earn her the praise of Alpha and as a reward is made the third-in-command of the Whisperers, a position Mary no doubt enjoys greatly.

Despite her claimed lack of remorse for her sister's death, Mary appears to show some amount of guilt and anger for her actions. She also seems unnerved by the sight of all the savage murders carried out by the Whisperers and appears to be increasingly fearful of Alpha, as seen in "What It Always Is". After discovering that Lydia was alive, discovering Alpha's lie, Mary suffered a temporarily mental breakdown, and broke down crying, before ultimately betraying the Whisperers by giving Aaron information in exchange for details about her nephew, Adam, whom Mary gained a newfound affection for.



Nothing is known about Mary's life prior to or as the outbreak began, except that she had a younger sister named Frances. The two lived nearby a large lake as children and would ride their bicycles around it together before sundown.


At some point following the outbreak, Mary and her sister found and joined a large group of primitive survivors known as the Whisperers. She and her sister became adept at sniffing out locations for the dead and assisted the group in accumulating their many herds. At least 8 years into the apocalypse, her sister gave birth to a baby boy though she would eventually be forced to abandon him on Alpha's orders.

Season 10

"We Are the End of the World"

Mary and Frances accompany Beta to collect more walkers for their herds under Alpha's orders. While luring the walkers, Mary notices Frances looking at the sun and acting odd. She tells her sister to focus and not jeopardize their place among the Whisperers. When they are corralling the herd on a field, Frances starts crying and causes some walkers to try to attack her. Beta kills them and says she will pay for this.

At their camp, Mary watches as Beta throws Frances to the ground and orders a Whisperer to kill her. As she starts screaming that her son is in a better place, Alpha demands they leave her alone. Later, Mary listens as her sister screams when she is forced to talk with Alpha. Then, as Frances goes back to her sister, a Whisperer questions whether they should go back to the other communities, but Mary pulls her sister away. At night, Frances tells her sister about Alpha showing mercy and how it felt to talk with her. Mary says she should forget about her son like how Alpha sacrificed her daughter for the pack. She also hopes Frances starts behaving better.

The next day, Mary follows Alpha as she leads a group of Whisperers to a field to gather more walkers. Suddenly, a satellite crashes through the sky and the herd starts to scatter. When Mary witnesses Frances attacking Alpha, she runs to save Alpha and pushes her sister to the ground to be devoured.

At their camp, Alpha questions Mary on whether or not she regrets letting her sister die. She confesses she will always be loyal to Alpha. She is then sent away. That night, Alpha anoints Mary as "Gamma" and the group praises her. The next day, Gamma questions Beta's feelings about her. They both claim to be empty as Alpha wants.


Gamma is sent on Alpha's orders to Alexandria to inform Daryl and Michonne to go to the north border, lay down their weapons, and wait for Alpha that night. Michonne asks her to call off her walkers but Gamma swears they're not theirs. She then instructs them again to go wait for Alpha at the border that night and leaves.

"What It Always Is"

Gamma is instructed by Alpha to take a walker and use its guts to contaminate the river where the communities take their water from. While doing her task, Gamma senses someone is watching her and then leaves.

Upon arriving back at their camp, Gamma tries to look at Beta but is ignored. She then asks Alpha for another guardian when suddenly a Whisperer defies Alpha on her strategies to confront the communities instead of using the herd. Gamma then watches as Alpha slashes the man with her knife and has Beta kill him.

Later that day, Gamma walks with the reanimated Whisperer. She starts having flashbacks to when she killed her sister and starts to stab repeatedly the Whisperer on its head. She ends up cutting herself and dropping her knife in the water. Aaron appears and throws some bandages. He introduces himself and tries to get her to do the same, but she picks up the bandage and runs back to the camp.

After returning, Gamma confesses to Alpha that Aaron gave her gauze for her wound. Alpha shushes her and instructs her to sit, before removing Gamma's mask. They discuss sacrifices and Gamma tells her that her sacrifice was much greater, in reference to Lydia. Alpha says Aaron might be useful for her plans and they might have to wear a new mask.  

"Open Your Eyes"

Gamma and Aaron meet on a bridge at one of the borders. She questions how his community is full of supplies like bread. He offers her some but she turns him down. Gamma then notices a drawing in his bag and he reveals he has a daughter named Gracie. She is surprised to hear that they have children in the community and explains that children hold you back. When Aaron asks about siblings, Gamma lies and tells him she's an only child.

Later that day, Aaron tells Gamma she can keep the drawing and tries to ask about her past. When she doesn't answer, he calls her out for digging for intel and thinks he should be doing the same. He then opens up about his younger brother and tries for her to the same. Before she can give in, Gamma leaves while repeating the Whisperer motto to herself.

Gamma then weeps to herself in the woods. Suddenly, a walker attacks her and she manages to kill it. She is then shocked to see Alpha standing nearby waiting. Alpha questions her about Aaron and Gamma says she learned his name and that he has a daughter. Alpha wonders if she asked about her sister's child but Gamma swears she didn't. Alpha then tells her to remove her mask and proceeds to whip her arm so she can remain strong. She goes on to tell Gamma that Aaron is tempting her with lies and she shouldn't be seduced. 

That night, Gamma meets with Aaron again. She hands him back Gracie's drawing and when he reaches for it, she grabs him from behind and puts a knife to his neck to question him. Suddenly, Carol emerges from the woods with her arrow pointed as Lydia also arrives. Gamma panics to see Lydia alive and runs off into the woods where she later breaks into tears due to having believed in a lost cause based on a lie.

"The World Before"

Gamma meets Aaron at the border on the bridge again and asks if the baby that was left to die outside Hilltop is still alive. When she reveals he is her nephew, Aaron says he was rescued by a family and is named Adam. She offers him information in exchange for seeing Adam. Before accepting any type of deal, Aaron makes her take off her mask and to tell the truth. Gamma says her name used to be Mary and reveals to him the location of Alpha's horde.


Mary will appear in this episode.


Mary will appear in this episode.

Killed Victims

This list shows the victims Mary has killed:

  • Frances (Caused)
  • Cheryl (Indirectly Caused)
  • 4 unnamed campers (Possibly, Caused or Direct)
  • 1 unnamed Whisperer (Zombified)
  • 1 unnamed Alexandria resident (Possibly, Directly or Indirectly Caused)
  • 2 horses (Possibly, Caused or Direct)
  • Numerous counts of zombies and unnamed people



Frances and Mary had a poor relationship. Following the outbreak and joining the Whisperers, Mary decided to put her loyalty fully towards Alpha and the group rather than her own sister and showed no remorse for her having to abandon her own child on Alpha's orders. She later expressed disgust and annoyance for Frances showing regret for abandoning her son and even claimed she should have left her for dead when she had the chance. Despite this she appeared pleased when Frances apparently renounced her feelings of regret though she did hesitate to feed her alive to the walkers after she attacked Alpha to kill her as revenge for making her leave her son for dead. Although Mary says that her death was necessary and she feels nothing for having done it, she still sheds a single tear. She likely completely gets over it quickly, however in the episode "What It Always Is", Mary has flashbacks of her sister's death and appears upset, hinting she may possibly have some regret.

Adam Sutton

It was evident that Mary originally did not care at all for her infant nephew as she showed no apparent remorse for her sister having to abandon her child to be eaten alive by the Walkers and was angered that her remorse over the deed distracted her and posed a threat to their place in the group. Mary even killed her own sister following her attempt to kill Alpha for making her abandon Adam. However, after learning about Alpha's lie about Lydia's fate, Mary gained a newfound interest and affection for her nephew, willingly giving out information to Aaron in exchange for news about Adam, even going as far as wanting to see him.


Mary is shown to be fiercely loyal to Alpha and fully committed to the Whisperer way of life. Alpha likewise appears to respect Gamma for her ability to sniff out key locations for walkers and views her as a valuable member of the group.

After saving Alpha's life in "We Are the End of the World" when her own sister attempts to kill Alpha as revenge for making her abandon her infant son, (to which Gamma pushes her to be devoured by walkers) Alpha is impressed at her dedication to the group and her desire to protect her leader and for her remorselessness over killing her own sister. As a reward for her actions, Alpha personally gives Mary her title and makes her the group's third-in-command.

However in "Open Your Eyes", Mary finds out Lydia is alive despite Alpha telling her she killed Lydia. She runs away crying. How she feels about Alpha is unknown.


Beta does not appear to be very fond of Mary due to her sister Frances almost causing Whisperers to be killed and later appears disgusted that Alpha appoints her as the group's third-in-command, and sees it as her way of coping with her abandonment of Lydia. Despite this, Beta respects Alpha's decision nonetheless, though he claims to have no feelings, good or ill, towards Mary.


Gamma was originally sent by Alpha to gather information from Aaron after Aaron offers her dressing for her wound. As she got to know Aaron, her guard begins to lower, though she quickly re-enforces her loyalty to Alpha. After she learns Lydia was not actually killed by Alpha in the Whisperer's name, she is distraught, and offers Aaron the location of Alpha's herd. When they went to investigate, the herd was not there and they are led into a trap. Whether or not Gamma meant for this to happen is unknown.


TV Series

Season 10


  • The term "Gamma" denotes the third most dominant role or position in a particular sphere or group.
  • Mary is the first of the three dominant Whisperers to be named.
  • According to a deleted scene, Mary is from California as correctly guessed by Aaron due to her accent.
TV Series Characters
Grimes Family JudithR.J.RickCarlLori
King County LambertPaulaShaneLeonMr. SiggardMrs. Siggard
Jones Family MorganJennyDuane
Atlanta Camp CarolDarylMoralesGlennAndreaMerleTheodoreDaleSophiaJacquiMirandaLouisElizaAmyEdJim
Nursing Home MiguelFelipeJorgeGuillermoGilbert
Jenner Family EdwinCandace
Greene Farm MaggieBethHershelPatriciaJimmyAnnetteShawnArnoldOtisJosephine
The Living NateRandallSeanTonyDave
Michonne's Group MichonneMikeTerryAndre
The Prison AxelOscarAndrewTomasBig Tiny
Woodbury JeanetteMrs. RichardsMcLeodPhilipCaesarShumpertJacobsonMr. RichardsOwenErynKarenGregMiltonStevensRowanEileenFosterBettyNoahPaulJodyRichardHaleyPennyWarrenMichaelGargulioCrowleyTimEmily
Tyreese's Group SashaTyreeseAllenBenDonna
Military Personnel WellesWilsonBradySeanFranklinCallaway
Prison Newcomers BobLizzieMikaLukeMollyJulioHenryNorisCalebDavidRyanCharlieChloePatrickZach
Chambler Family TaraLillyMeghanDavid
Martinez's Group HowardMitchAlishaPete
Ford Family AbrahamEllenA.J.Becca
Post-Prison Survivors EugeneRositaChristopher
The Claimers DanBillyHarleyTonyJoeLenLou
Terminus MartinGregTheresaGarethAlbertMikeMaryAlex
St. Sarah's Church Gabriel
Grady Memorial Hospital StevenTanakaAlvaradoAmandaBelloLicariPercyMcGinleyFrancoNoahDawnO'DonnellBobJeffriesGormanJoanGavinHanson
Alexandria Safe-Zone AaronBarbaraScottKyleNoraAlexSocorroJenWayneHeathMrs. RobinsonCherylEnidRussBobBruceTobinKent AnnaMikeyFrancineSpencerOliviaDeniseDeannaLucyRonJessieSamMayaDavidBetsyNicholasAnnieWillTommySturgessBarnesNatalieStacyMichaelJefferyRichardsHollySamanthaBobbyCharlyneO'HaraDineshDanErinAdrianParkShellyCarterPeteRegAidenEric
The Wolves OwenAphid
The Saviors NeganLauraQuanAldenGracieAliceSherryDwightAmberTanyaMarkGinaPotterJoséBrookeMelJohnMarcusJonahBrandonFrankieD.J.RichieRegina JedNorrisArat JustinSimonDukeLanceGaryReillyJaredEvanKatyKenoDerekDeanGavinGomezPaulieDukeZiaLeoYagoJoeyGuntherRudyToddDinoHuckWadeCamNelsonMaraGordonRoyDavidEmmettIsabelleJosephChrisGeorgeNeilRomanJiroMilesPrimoPaulaMichelleMollyDonnieGabeTimmyTina
Hilltop Colony BertieKalEduardoOscarMarcoEarlHershelGageBriannaAdelineRodneyTammyCasperMartinMilesHildePaulGregoryKennethStephanieCraigCrystalWesleyHarlanNeilFreddieAndyEthan
The Kingdom EzekielJerryDianneNabilaJennyWilliamHenryDanaKevinKurtAlvaroDanielColtonRichardBenjamin
Oceanside CyndieRachelBeatriceJulesKathyNatania
The Scavengers AnneTamielBrionFarronWinslow
Georgie's Group HildaMidgeGeorgie
Magna's Group MagnaLukeConnieKellyYumikoBernie
The Whisperers AlphaAdamBetaMaryLydiaDanteFrancesZionRasmusSeanHelen
Shelter Survivors CyrusAmandaLamarFrankRoseMatias
The Highwaymen AlfredMargoAlekOzzy
Jocelyn's Group WinnieP.J.GinaLinusMitchellJocelyn
Bloodsworth Island Virgil
Unknown Location RufusPrincess
Miscellaneous Survivors WilhelmSiddiqMiloAmeliaEastmanSamAnaMrs. BlakeClaraLucille
Animals DogNellyShivaTabithaButtonsDukeFlameViolet
Walkers CarlaDellyJoe Sr.BillTonyNickErinDougLouiseWayneSummerHannahEddie
Alive characters appear in green. Dead characters appear in red and italics. Unknown characters appear in blue. Undead characters appear in gray and italics.

Start a Discussion Discussions about Mary (Season 10)

  • Why does Gamma have black eyes?

    8 messages
    • Then why was Lydias face clean when they found her?
    • Her face wasn’t clean.
  • is Gamma infected ?

    16 messages
    • Mistertrouble189 wrote: Narutorulez wrote: I think by the mask she means spy on Aaron.  i also think she will tell them her real name. i th...
    • I AM the writers room wrote:Mistertrouble189 wrote: Narutorulez wrote: I think by the mask she means spy on Aaron.  i also think she will t...
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