For millennia, calendars have added an extra day every four years. In doing so, they violated the ancient Mayan calendar.Now we are in the 13th month of the 13th year of the new millennium, and the few who survive will battle a world of demons.
Despite having a good time teaching Eve how to drive, Mike thinks Vanessa should take over so she and Eve can bond; Mandy is annoyed by Mike's endless requests for Kyle to do work around the house.
Sherlock must face his past when he travels to London to revisit an old case; Watson learns more about Sherlock's pre-New York life; Sherlock's brother, Mycroft, reveals some secrets.
In the Season 12 premiere, Peter believes a restaurant place mat to be a treasure map, and soon the residents of Quahog are turning the town upside down and turning against each other.
The Jeffersonian team investigates the murder of Jamie Delcampo, a member of the Estrellas Locas gang, whose remains were found in a burnt out car. Meanwhile, having taken time off from the FBI in the wake of Pelant's latest assault on the team, Sweets ultimately decides to help with the investigation when he discovers that a young boy from the center where he volunteers is the son of one of the gang members.
Beckett races to find a stolen toxin capable of killing thousands of people; Castle has less than 24 hours to live after being exposed to the chemical weapon.