Shane Walsh/Season 1

When the camp received on the radio an emergency broadcast from a man on his way to Atlanta, Shane tried to answer the message but the signal was abruptly cut off. After disagreeing with Lori about her idea of ​​putting up signs on the road to warn people away from the city, Shane followed her to her tent to remind her that she couldn't risk her life because of her son and then they ended up reconciling with a passionate kiss. ("Days Gone Bye")

Some hours later, Shane met with Lori secretly in the woods to have sex, although for a moment they felt uncomfortable after noticing Rick's wedding ring in a locket around her neck. Later that day, while teaching Carl how to make a rope, the camp received T-Dog's distorted distress message. Upon deducing that their companions needed help in the city, Amy pleaded to send rescue but Shane refused, claiming that it was too dangerous. ("Guts")

When Rick reappeared in the camp with the group that had traveled to the city for supplies, Shane was happy to see his friend alive and well again, although he began to grow resentful of him after finding that the idyllic life he had built with Lori and Carl had come to an end. The next day, while Rick and some group members returned to Atlanta to rescue Merle Dixon, Lori told him to stay away from her family due to lying to her about her husband's death. Frustrated, Shane released his anger with Ed Peletier after seeing him hit his wife Carol, and beat him savagely, before warning him that if he hurt his family or anyone else in the camp, he would kill him next time. ("Tell It to the Frogs")

After Dale informed everyone at the camp about a paranoid Jim digging holes without an explanation, Shane subdued him and tied him to a tree until he would feel better. Shortly after, Shane again asked him why he was digging the graves, although Jim only confessed that it was due to a dream that he had. That night, everyone was reunited around a campfire as they listened to Dale's stories. When the camp was attacked by several walkers, Shane was forced to protect Lori and Carl. Although Rick and the others returned in time and helped defend the camp, several people had already lost their lives in the attack. ("Vatos")

The next morning, Shane blamed Rick for leaving the camp defenseless because of his rescue mission and insisted on going to Fort Benning for safety. When Rick instead suggested heading to the CDC to find a cure for Jim, who had been bitten during the attack, Shane sought out Lori to help convince Rick to change his mind, but she refused. As they surveyed the forest for walkers, a furious Shane aimed his shotgun at Rick's back, but came back to his senses at the last second, though this was witnessed by Dale. The next day, Shane decided to support Rick's idea and also said goodbye to the Morales family. While the remaining group of survivors departed towards the CDC, they left an agonizing Jim under a tree by the road as his last wish. Upon arriving at their destination, they found everything abandoned. As some walkers began to approach them, Shane tried to convince Rick to leave when suddenly the doors opened in time. ("Wildfire")

Upon entering the CDC, Shane and the others were reluctantly welcomed by the sole remaining employee, Dr. Edwin Jenner, who allowed them to stay in exchange for some blood tests. That night, the group had a feast in the cafeteria and enjoyed all the luxuries the facility had to offer, except for Shane. After drinking too much, Shane tried to explain to Lori what really had happened when he went to rescue Rick, and believing that she loved him, attempted to sexually abuse her only to have his neck scratched. The next morning, Shane and the group learned that the virus that had caused the outbreak erased any conscious human traits from someone infected.

When the power generators began to ran out of fuel, Jenner revealed that the facility would explode due to a self-destruct protocol and then sealed everyone inside the control room, explaining that it would be a quick and painless death. An enraged Shane tried to force him to open the doors, threatening to kill him otherwise. After Rick eventually made Jenner change his mind, the survivors ran in a hurry to escape. Upon finding the top doors locked, Carol handed Rick a grenade she had found in his uniform and everyone took cover as he used it to blast one of the windows. Shane and the group escaped as the CDC exploded and then continued their journey towards a new destination. ("TS-19")