Josh investigates the suicide of a pilot with whom he has things in common; Donna tries to get an invitation to the Congressional Christmas party to hear Yo-Yo Ma perform; Jed insists on signing a mountain of Christmas cards himself; after a White House visitor has a strange reaction to a painting, C.J. sets out to discover its provenance; following weeks of volatile behavior and an outburst in the Oval Office, Josh meets with representatives from the America Trauma Victims Association and finally deals with the trauma from his shooting.