Season 4, episode 02
InfectedIn the middle of the night, a flashlight switches on at the prison gate and shines over the faces of a pair of walkers. An unseen individual dangles a rodent in front of the walkers, and pushes it through the gates to feed them...In the prison library, Karen is embracing Tyreese, who expresses regret over what happened to Zack. He sings a few bars of "I've Got You Under My Skin" to her chagrin, and he reaffirms his love for her. He tries to follow her to her cell, but she replies that she isn't ready yet, and walks off.As Karen walks through the prison halls, she passes the shower stalls and hears a noise nearby. As she moves to investigate the sound, she passes the now-undead Patrick. Moving into D Block, she retires to her cell. Soon after, Patrick enters and moves towards Karen's cell, only to be distracted by coughing a few feet away. He enters the nearby cell and bites into the throat of one of one of the Woodbury residents.The next morning, Rick is up early with Judith and motions for Carl to wake up and come outside. In D Block, Patrick is still feasting on the corpse when he is distracted by more coughing, and walks back outside. The bitten Woodbury civilian gets up and also begins to move out of the cell.Nearby, in the prison guardtower, Glenn is watching Maggie sleep. He pulls out an analog camera and takes a picture of her, to her bemusement. Glenn offers to bring Maggie breakfast as she goes on guardtower duty, and he heads out to check the perimeter.Rick and Carl escort Michonne as she heads out on another scouting run. Soon after, the father and son begin to work on the farm. As they do, Carl notices the prison fence beginning to sway. Carl asks Rick to help, but Rick tells him that they have other plans to worry about.Rick then feeds the pigs, and Carl apologizes for his behaviour as of late. He asks when he can have his gun back, and Rick brushes it off. Suddenly, a lous noise and a cry for help is heard from inside the prison, alerting Rick, Carl and the departing Michonne. Rick tells Carl to get to the guardtower with Maggie, as he meets with Sasha and Daryl and they run inside.As Rick's group runs in, Carl opens the gate for Michonne, only for two walkers to follow right behind her. As Michonne tries to push away the walkers, Carl runs up and dispatches them with a rifle. Maggie helps Michonne inside while Carl closes the gate again. As they move inside, Maggie notices that walkers are converging on the gates.Inside D Block, a man is firing at walkers when Rick, Daryl and Sasha run in. Rick orders everyone to get out of the block, while Daryl rescues a young boy who is being attacked. Glenn, Carol and Rick rescue as many people as they can, while Tyreese finds Karen, who has been unharmed. Carol brings another man who has been bit into a cell and prepares to amputate his arm, The group dispatches the rest of the walkers, but the man Carol is treating, Ryan, goes into shock.As the group checks the cell block again, Daryl dispatches the undead Patrick. Rick takes out a bloody-eyed walker that emerges from inside his cell. They realize that Patrick is bleeding from the eyes, and survey the rest of the fatalities. Ryan begs Carol to look after his daughters for him, but she says he can wish them goodbye himself.Rick, Daryl, Bob, Hershel and Dr. Subramanian examine the second walker, Charlie, who had also died without being bitten as he locked himself in his cell because he suffered from sleepwalking. Hershel speculates the walker choked on its own blood, while the doctor speculates that it was immunococcal - a virus. Rick realizes that the bleeding walkers at the prison gates, Violet the pig's death, and the sick boar he encountered at the woods are connected. Hershel realizes that everyone has been exposed.Inside his cell, Ryan's daughters are with him. They tearfully plead Dr. Subramanian to save him, but Carol replies that he's too far gone. Soon after, they watch as he passes away. Carol asks them to wait outside, but they offer to keep their father from turning. As Carol watches, the eldest daughter, Lizzie, tries to perform the act but can't go through with it. Carol then stabs Ryan in the head as they cry.Outside, Carl and Maggie are bringing Michonne back in. Rick walks out as Carl runs to him, and although Rick tells his son not to get close, he hugs his father. Carl apologizes for taking a gun, but Rick tells him to stay back. Rick tells him about Patrick's death and what happened in the cellblock, and that they shouldn't get close to anyone who may have been infected.Inside the library, the prison council - Carol, Sasha, Daryl, Glenn and Hershel - discuss what to do. Hershel explains that the sickness can be lethal, and wonders if anyone is showing symptoms. but Carol thinks they have to quarantine those who might have been infected.Outside, Tyreese is walking Karen back to her cell when the council overhears and comes out. Although Tyreese explains that he's just walking her back, Hershel states that there's a large amount of risk in that cell block. He tells Tyreese and Karen that they'll have to be quarantined. Daryl then offers to bury the dead, and Hershel cautions him to wear a mask and gloves while handling them.Outside, Lizzie and Mika are mourning when Carol comes out. She tells the sisters that she knows how hard it is, but Lizzie isn't listening. Carol tells her that in times like this, she has to act fast in order to live, while Lizzie tries to rationalize what happened. Mika tells Carol Lizzie isn't weak, just messed up. Outside, the outer prison gate is teetering inward. Nearby, Daryl digs several graves as Rick walks up. Daryl tells him that he's glad Rick was there, and the group needs his skills and leadership.Rick tells Daryl that he can't be a leader, but Daryl tells him that he's earned some praise. Suddenly, Maggie screams at them to come over - the gate is buckling. As they run up and try to dispatch the walkers amassing near the gate, Despite their efforts, the gate continues to buckle.Inside, Michonne chastises herself while Beth explains that it wasn't her fault. Judith begins crying, and Beth explains that Judith always cries when she can sense a person's mood. Beth takes Judith out as Michonne shudders in pain from the loud noise. Soon after, Beth walks by and asks her to hold the child when it vomits up carrots on her. Michonne dismissively holds her, but soon breaks a tearful smile and hugs her. Elsewhere, Carol visits Carl and asks if he told his father about what she was teaching the kids. She reasons that the kids need those skills to survive, but Carl is dismissive.Outside, Sasha discovers the remnants of the eaten rats, but the fence suddenly buckles in. As they try to hold it up, Daryl orders them to get back. Rick surveys the area and the farm, and orders Daryl to get his truck. As they drive outside, Rick opens up a box containing several piglets, and cuts them to draw in the walkers. The pressure on the wall lessens as the walkers pursue and devour the piglets.Later that day, Carol helps Lizzie and Mika come to terms with the fact that their father is gone. Nearby, Rick takes down the pig pen as Carl walks up. Rick cautions that they have to stay away from Judith for fear of being infected. Carl then explains Carol's lessons, but explains that it's needed for the good of the prison. Rick thanks him for sharing the information, and sets the remnants of the pen on fire before giving him back his gun and reloading his own Colt Python. He throws his bloodied shirt into the fire, and looks over the prison gate as the flames rise behind him.Elsewhere, Tyreese walks to Karen's cell with a bouquet of flowers, but is shocked to see blood on the bed and walls. He follows the trail of blood outside, and discovers two burned bodies. As he drops to his knees in shock, he sees Karen's bracelet and realizes she is dead...