Pa Hack's Brood (1963) was the 318th and middle episode of Gunsmoke (1955)'s 20 seasons & 635 episodes. The longtime series beginner, Matt Gets It (1955), was 317 episodes before and The Sharecroppers (1975) the series conclusion, was 317 episodes after.
Lynn Loring played Maybelle Hack in this episode and some years later played another Maybelle in The Big Valley. She was an outlaw's girlfriend, Maybelle Williams in Judgement in Heaven.