When Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer. Meanwhile, Ryan's wife, Jenny, goes into labor, but disaster threatens to ruin the joyous moment.

From "Girls", creator and actress Lena Dunham; from "New Girl", actor Max Greenfield; musical guest Brandy Clark.

The squad must work quickly to track down a serial killer before he strikes again. Meanwhile, things get dangerous over a game of chess.

Episode info coming soon ..

America endures a polar vortex, the FDA targets antibiotics in livestock, recreational weed goes on sale in Colorado, and Ken Roth discusses Human Rights Watch.

Comic Kathy Griffin; from "Tusk", actor Haley Joel Osment.