In 2254, Nancy became romantically involved with Dr. McCoy; she even had a nickname for him, "Plum". Their relationship broke off in 2256, but McCoy's feelings for Nancy remained unchanged for almost a decade. In 2261, the Craters arrived at planet M-113. Professor Crater began a multiyear archaeological excavation of the ruins of an ancient and extinct civilization. In 2265, Mrs. Crater was killed by the last of the M-113 creatures. Her husband buried her on a hill. He forgave the creature, who afterwards took on the appearance of his wife.