As the end of the first year at Hearst College draws to an end, the election for sheriff in Neptune comes to a close and Veronica and Piz discuss the effect a summer apart will have on their relationship.

Mort Goldman accidentally steps into a time machine and winds up in 1939 Poland in the middle of the Nazi invasion. Brian and Stewie follow him to Nazi Germany in an attempt to save him and bring him back to the present safely.

Sydney gets one last chance to bring Arvin Sloane to justice before he executes his grand plan, when her mother reveals her true motivation. But all this is only the beginning of a series of spiralling revelations that ends with a shocking cliffhanger that will alter Sydney's life forever.

Monk undergoes hypnotic therapy as treatment for his OCD. After a session, he adopts a more childlike personality. Meanwhile a soon-to-be divorced woman disappears and a murder occurs.

The Cohen family says goodbye in the series finale as the episode jumps six months after the earthquake to show the Cohens, Ryan, Taylor, Summer and the Cooper women trying to piece their lives back together. The Cohens find out that fixing up their old mansion would cost more than rebuilding it but Ryan and Seth see this as an opportunity to give Sandy and an expecting Kirsten a surprise that'll change their lives.

With the Rift having been opened, people and objects throughout time are falling through it, and being spread across the world. "The thing in the darkness" has finally come, and Jack realises that he is the only one who can save planet Earth from the destruction that "the son of the Beast" will cause.