Question: Hershel Greene a fictional character portrayed by Scott Wilson, saves the life of Chandler Riggs's character in an American television series which airs on what? 

full_context: Document 1: Carl Grimes: Carl Grimes is a fictional character from the comic book series "The Walking Dead" and is portrayed by Chandler Riggs in the American television series of the same name, which airs on AMC in the United States. The character was created by writer Robert Kirkman and artist Tony Moore, and debuted in "The Walking Dead" #2 in 2003. In both forms of media, Carl is the son of primary protagonist Rick Grimes, and his wife Lori Grimes, and is one of the longest-surviving characters and one of the few original Atlanta survivors still alive.
Document 2: Jessie Anderson (The Walking Dead): Jessie Anderson is a fictional character in the comic book series "The Walking Dead" and is portrayed by Alexandra Breckenridge in the television series of the same name. She is a resident in the Alexandria Safe-Zone. Created by writer Robert Kirkman and artist Charlie Adlard, the character made her debut in "The Walking Dead" #72 in 2010. In both media Jessie is living in an unhappy, abusive marriage with her husband Pete, despite the zombie outbreak, and her son Ron (and Sam in the TV series) in the Alexandria Safe-Zone.
Document 3: Cherokee Rose (The Walking Dead): "Cherokee Rose" is the fourth episode of the second season and 10th episode overall of the post-apocalyptic horror television series "The Walking Dead", which aired on AMC in the United States on November 6, 2011. The episode was written by Evan Reilly and directed by Billy Gierhart. In the episode, the group of survivors move to the home of Hershel Greene (Scott Wilson). While the group contemplates on what to do, Daryl Dixon (Norman Reedus) continues to search for Sophia Peletier (Madison Lintz).
Document 4: Scott Wilson (actor): Scott Wilson (born March 29, 1942) is an American film and television actor. He has more than 50 film credits, including "In the Heat of the Night", "In Cold Blood", "The Great Gatsby", "Dead Man Walking", "Pearl Harbor", and "Junebug". In 1980, Wilson received a Golden Globe nomination for Best Supporting Actor – Motion Picture for his role in "The Ninth Configuration". He played veterinarian Hershel Greene on the AMC television series "The Walking Dead" from 2011 to 2014. He had a recurring role on "" as casino mogul Sam Braun.
Document 5: Lori Grimes: Lori Grimes is a fictional character from the comic book series "The Walking Dead" and is portrayed by Sarah Wayne Callies in the American television series of the same name in the show's first three seasons. Created by writer Robert Kirkman and artist Tony Moore, the character made her debut in "The Walking Dead" #2 in 2003. In both forms of media, she is the wife of protagonist Rick Grimes and mother of Carl, and serves as the emotional core of the group. The character escaped the zombie apocalypse with Carl and Rick's partner Shane Walsh, and, believing her husband to be dead, started a relationship with Shane.
Document 6: Rosita Espinosa: Rosita Espinosa is a fictional character from the comic book series "The Walking Dead" and is portrayed by Christian Serratos in the American television series of the same name. She accompanies Eugene Porter and Abraham Ford on a mission to Washington, D.C. In the comic book series, she joins Rick Grimes' group after they leave Hershel Greene's farm and go to DC. Eventually Eugene is revealed to have lied but they continue onto Washington anyway, since he was still convinced the city would offer greater chance of survival, and they eventually find the Alexandria Safe-Zone. Though she and Abraham continue their relationship she eventually breaks up with him when he cheats on her with Holly and moves in with Eugene, eventually starting a relationship with him, but forgives Abraham after he is killed by Dwight. Rosita also takes part in the war against the Saviors led by Negan it's conclusion of which sees the 4 communities uniting forces. Two years later Rosita and Eugene are married but their relationship is strained. Rosita is revealed to be pregnant, but Eugene is not the father. She is ultimately killed by Alpha, leader of the Whisperers, along with 11 other key members of all 4 communities.
Document 7: List of The Walking Dead (TV series) characters: "The Walking Dead" is an American post-apocalyptic horror television series developed and executive produced by Frank Darabont. It is based on the eponymous comic book series by Robert Kirkman. The following is a list of characters from "The Walking Dead" television series. Although some characters appear in both places, the continuity of the television series is not shared with the original comic book series.
Document 8: Christian Shephard: Dr. Christian Shephard is a fictional character on the ABC television series "Lost" played by John Terry. He is the father of lead characters Jack Shephard (Matthew Fox), who becomes the de facto leader of the survivors of Oceanic 815 after it crashes on an island, and Claire Littleton (Emilie de Ravin), another of the survivors on the Island. Christian died of an alcohol-induced heart attack days before the flight, leading to much of his story being told through flashbacks. In the fourth season and fifth season he is again featured on the Island several times, seemingly acting as a messenger for the leader of the Others, Jacob (Mark Pellegrino). In the sixth season, the Man in Black (Titus Welliver/Terry O'Quinn) admitted that he had "impersonated" Christian during the first week after the crash of Flight 815.
Document 9: Sophia Peletier: Sophia Peletier is a fictional character from the comic series "The Walking Dead" and is portrayed by Madison Lintz in the television series of the same name. She is the daughter of Carol Peletier, who is fiercely protective of her, as is Carl Grimes, with whom she becomes close friends during the zombie outbreak. She becomes a major focal point in both media, despite her limited involvement in many of the central conflicts faced by the other characters.
Document 10: Beth Greene: Beth Greene is a fictional character from the American horror drama television series "The Walking Dead", created by season two showrunner Glen Mazzara, and portrayed by Emily Kinney. Daughter of veterinarian and farmer Hershel Greene, and younger, half-sister of Maggie, the character has no counterpart in the comic book series on which the show is based.
Document 11: Chandler Riggs: Chandler Riggs (born June 27, 1999) is an American actor, known for his role as Carl Grimes on "The Walking Dead", an AMC television horror drama series (2010–present).
Document 12: Hershel Greene: Hershel Greene is a fictional character in "The Walking Dead" whose role is depicted in the comic book, television series as portrayed by Scott Wilson and the game series. He is the widowed owner of a farm in Georgia and has previous experience in the veterinary fields. A devout Christian, with uncompromising morals and a stubborn attitude, Hershel remains fiercely protective of his large family, despite his many losses. In both the comics and television series, he is initially introduced saving the life of Carl Grimes, the son of Rick Grimes after he is shot by one of Hershel's neighbors, Otis, and becomes the moral center of the group .
Document 13: Gareth (The Walking Dead): Gareth is a fictional character from the American television series "The Walking Dead" portrayed by Andrew J. West. Gareth is based on Chris from the comic book series of the same name, according to West himself. Gareth is introduced at the end of season 4. He is initially introduced as the welcoming yet mysterious leader of Terminus. However, his true motivations are revealed after Gareth forces Rick Grimes and his fellow survivors into train car A. At the beginning of season 5, it is revealed Gareth and his entire community are cannibals. As the result of the actions by Carol Peletier, the group escapes, leaving many casualties of Terminus. Gareth, however, leads the remaining survivors to try to hunt down Rick's group and eat them.
Document 14: Nebraska (The Walking Dead): "Nebraska" is the eighth episode and mid-season premiere of the second season, and 14th episode overall of the post-apocalyptic horror television series "The Walking Dead". It originally aired on AMC in the United States on February 12, 2012. In the episode, the survivors deal with the aftermath of the barn shooting, which causes Hershel Greene (Scott Wilson) to order Rick's group to leave and then start drinking and disappear from the group, leading Rick Grimes (Andrew Lincoln) and Glenn (Steven Yeun) to try to find him. Meanwhile, Dale Horvath (Jeffrey DeMunn) becomes more suspicious of Shane Walsh's (Jon Bernthal) actions.
Document 15: The Walking Dead (TV series): The Walking Dead is an American post-apocalyptic horror television series developed by Frank Darabont for AMC that is based on the eponymous comic book series of the same name by Robert Kirkman, Tony Moore, and Charlie Adlard. Andrew Lincoln plays the show's lead character, sheriff's deputy Rick Grimes, who awakens from a coma discovering a world overrun by zombies, commonly referred to as "walkers". Grimes reunites with his family and becomes the leader of a group he forms with other survivors. Together they struggle to survive and adapt in a post-apocalyptic world filled with walkers and opposing groups of survivors, who are often more dangerous than the walkers themselves. Much of the series takes place in and around Atlanta, Georgia, and Alexandria, Virginia.
ground_truth: AMC