Ted Kennedy's life and political career become derailed in the aftermath of a fatal car accident in 1969 that claims the life of a young campaign strategist, Mary Jo Kopechne.
After a woman kills a home invasion robber in self-defense, his vengeful girlfriend befriends her at a crime victim support group and sets about trying to destroy her life.
Dennis and Dee decide to teach Frank a lesson "A Christmas Carol"-style, and Mac and Charlie learn some shocking things about their childhood Christmas traditions.