"Killer Grannies" is a true-crime series that chronicles the most shocking and unpredictable cases involving a killer no one would suspect: Grandma. Who would believe that these seemingly sweet older women, these beloved caretakers ... are killers? In every self-contained episode, a roller coaster ride of a case unfolds as investigators dig deep and chase every lead until they finally catch their unexpected killer. Friends and family alike are stunned to learn that their beloved Granny has a secret life, with criminal acumen and homicidal instincts they could never have imagined. Through gripping archival footage, selective recreations and cinematic imagery, and in-depth interviews with investigators, prosecutors, friends and family, every episode will peel back the plastic cover on the couch to uncover a world of sinister plots and evil deeds unpacking why and how these maternal matriarchs of the family can turn deadly. Viewers will watch each week, incredulous, as the suspect removes her bifocals to reveal the concealed eyes of a devious mastermind.