Joe

Rick (Andrew Lincoln) literally took a bite out of crime in the season four finale. When Joe (Jeff Korber) held a gun to Rick's head in a bid to avenge the death of his friend Lou and the rest of the so-called "Claimers" threatened to rape and kill both Carl and Michonne, Rick head-butted the guy and took a massive bite from his neck. Joe bled to death shortly afterward and Rick repeatedly stabbed Carl's attacker to death in one of the bloodiest scenes in Walking Dead history.

STORY: 'Walking Dead's' Andrew Lincoln on Taking a Bite Out of Crime

Lizzie and Mika

Despite Carol's (Melissa McBride) best efforts to explain to young sisters Lizzie (Brighton Sharbino) and Mika (Kyla Kenedy) that the walkers are a danger and they need to fight and be able to kill in order to survive, Lizzie just couldn't wrap her head around the idea. The elder of the two siblings stabbed her sister to death in a bid to prove to Carol that walkers come back to live with their humanity in tact. Carol and Tyreese (Chad Coleman) were left with little choice but to execute Lizzie before she attempted to kill baby Judith. 

STORY: 'The Walking Dead's' Melissa McBride Talks Carol's Devastating Decision

The Governor

David Morrissey's The Governor met his maker in season four's midseason finale. After leading his army -- and tank! -- in a bid to claim the prison as his own, Michonne and later Lilly take down the villain.

Hershel

Hershel (Scott Wilson) paid the price for urging The Governor (David Morrissey) to coexist at the prison with Rick (Andrew Lincoln). In the fourth season's midseason finale, The Governor brutally beheaded Maggie and Beth's father as his daughters looked on in the battle for the prison.

Andrea

Poor Andrea (Laurie Holden). After having so many chances to kill the Governor, the former civil rights attorney fails to survive season three when her bid for peace ends in the Governor's torture chamber, where she's left to die after Milton turns. In a valiant effort, she frees herself from the Governor's shackles but not before Zombie Milton takes a bite of her neck. She ultimately shoots herself in the head using Rick's gun in order to prevent turning into the undead. RIP, Andrea. 

STORY: 'Walking Dead's' Death Toll Rises Again in Brutal Season 3 Finale

STORY: 'Walking Dead's' Laurie Holden on Andrea's Fate: 'It Was the Right Ending'

Milton

Milton (Dallas Roberts) proved what happens when you betray the Governor (David Morrissey). During the season three finale, the former science guy is held accountable for destroying the Governor's pit of walkers when he's stabbed to death and left to turn -- and kill Andrea (Laurie Holden).

STORY: 'The Walking Dead's' Dallas Roberts on Milton's Twisted Fate

Merle

Michael Rooker's Merle Dixon made his return to the zombie drama during season three. After being left for dead on an Atlanta rooftop, the elder of the Dixon brothers turned up as the Governor's (David Morrissey) right-hand man in Woodbury. After escaping a fight to the death with his brother, Merle would later die at both of their hands. When solo attempt to kill the Governor fails, the ruthless Woodbury leader shoots him — and leaves him for Daryl (Norman Reedus) to find — reanimated as a zombie, where the younger Dixon is forced to end his life once and for all.

Axel

Poor Axel (Lew Temple). Just when Carol (Melissa McBride) was starting to warm up to the former prisoner's charms, he was the first victim in the Governor's surprise attack on the prison. His death, however, was not in vain when Carol used his lifeless body as a shield to protect her from the Woodbury leader's first assault on Rick's community. 

Lori

Perhaps the group's greatest loss to date, Rick's wife Lori (Sarah Wayne Callies) died during childbirth. After suffering complications during labor -- all set against a walker attack on the prison -- Lori has Maggie perform an emergency C-section and cut her baby out of her, with Lori's body unable to handle the shock. After Maggie pulls the healthy baby from Lori's body, Carl is left to deliver the final blow to prevent her transformation. 

STORY: 'Walking Dead's' Sarah Wayne Callies, IronE Singleton on Lori and T-Dog's Heartbreaking Fates

T-Dog

T-Dog (IronE Singleton) died a heroic death when Andrew allowed the prison to be nearly taken over by walkers. Bitten by a walker while securing the gate to prevent additional zombies from entering the grounds, T-Dog sacrificed his life to allow Carol to flee from the cellblock as it was becoming overrun by the undead. 

STORY: 'Walking Dead's' Sarah Wayne Callies, IronE Singleton on Lori and T-Dog's Heartbreaking Fates

Tomas

Tomas (Nick Gomez) was the leader of a group of prisoners who had been confined in the prison who first encounter Rick when he's tasked with amputating Hershel's leg after a zombie bite. Clashing with Rick for control of the grounds, Rick kills him with a machete after Tomas attempts to kill Rick twice. It marked the latest in a line of Rick's drastic measures to protect the group. 

Dale

Often the conscience of the group, Dale (Jeff DeMunn) defended Randall until the end. Steamed that Rick decides to kill Randall, Dale wanders off on the farm at night and stumbles upon a cow that a walker had gutted. Stunned, he comes face to face with a walker that Carl had baited out of a nearby swamp and attacked. Hearing his screams, the group comes to his aid to find him disembowled. In a final act of mercy, Daryl ultimately shoots Dale in the head, ensuring he won't be reanimated. 

STORY: 'The Walking Dead' Dissection: Robert Kirkman Spills on Dale's Death

Dr. Edwin Jenner

Randall

Originally a member of a random group of survivors that Rick ultimately guns down at a bar with Hershel and Glenn, Randall (Michael Zegen) was taken prisioner by the group, despite his high school connection to Maggie. With the group divided over what to do with him, Shane takes matters into his own hands and sets him free, later snapping his neck in the woods and telling Shane, Rick and Glenn that he was attacked. Reanimated as a zombie, Glenn is later tasked with delivering the final blow with a machete.

Shane

Shane far outlived his comic book counterpart on the AMC zombie drama. After the start of the apocalypse, with Lori presuming Rick to be dead, she begins a romantic relationship with his best friend and sheriff's partner, Shane (Jon Bernthal). Shane was bumped to second fiddle when Rick returned, continuing to pine for Lori. After months spent watching Rick make what he felt were the wrong decisions for the group -- and after Lori's pregnancy becomes public -- Shane lured Rick into the woods (via Randall) where the duo had a showdown for the ages. Rick ultimately stabs shane in the chest, ending his mortal life and ultimately proving Jenner's theory that everyone was infected. Reanimated, Carl pulls the trigger and ends Shane's zombie life shortly afterward. 

STORY: 'The Walking Dead' Dissection: Robert Kirkman Dishes on 'Monumental Event'

Sophia

Carol's daughter Sophia (Madison Lintz) was lost during the second season premiere during an attack on the group on the highway. With the first half of the season focused on finding the little girl, the group discovered her whereabouts after learning that Hershel, clinging to hope that the walkers could somehow be brought back to their human form, was keeping them holed up in his barn. The last zombie out during the massive attack? Sophia, who had been there the whole time. 

STORY: 'The Walking Dead' Dissection: Talks Death and What's Ahead

Otis

Hershel's farmhand Otis (Pruitt Taylor Vince) accompanies Shane on a trip into town to collect medical supplies after Carl is shot by a stray bullet Otis intended for a deer. After the duo encounter a pack of walkers that stood between their escape back to the farm, Shane shoots Otis in the leg and sacrifices him to the walkers to allow him to return to Rick with the supplies for young Carl. 

Amy

Andrea's younger sister, Amy (Emma Bell) was bitten not once but twice during a season one attack on the group. Unable to let go of her sister, Andrea stays next to her dead sister all night -- until she rises again as a zombie, forcing Andrea to deliver a fatal bullet to the head. Despite their rocky relationship, Amy's death sends Andrea into a suicidal phase that lasts well into the second season.