Sam Stone is the minister at the local church. He is also the second husband of Didi Stone and the stepfather of Jack Pappas. Sam and Didi met at grief counseling after Didi's first husband passed away.
He tried to make Grace Bowman (Jack's girlfriend) see that her having sex with Jack had nothing to do with her father's death. Sam also helped Amy Juergens find couples to adopt her baby while she was pregnant.
Sam moved to Phoenix, Arizona with Didi after being offered at job at his alma mater as the head of the philosophy department, leaving Jack to finish his senior year of high school.