Cal Gibson

Lily comes home from a trip to Seattle but a blizzard halts her return and threatens her tradition of meeting Marshall at airports after a work trip.

Castle and Beckett race to find the `Linchpin' in order to stop the first domino in a chain of events which will plunge the United States into war.

Still on crutches, John Carter returns for a tough first day in the ER since the attack and treats an attempted suicide with uncharacteristic harshness. Mark Green is angered when his father both refuses treatment for his lung cancer, and then chooses Elizabeth as his physician when he is admitted with breathing difficulties.

Will is abashed when his Aunt Vivian unwittingly arouses the passions of a man of the cloth.

Hunter fears for McCall's life when a pornographic filmmaker, suspected of two murders, lures her to his beach house.

Boss sets up a betting parlour in a deserted building, then patches in the Dukes' telephones to use for taking bets.