The parents of a missing college student seek help; David gets help on the Cytron case from an unexpected source; Mellie proves her political prowess.
Leo fears the worst when he testifies in the congressional investigation into Bartlet's lack of public disclosure about his illness.
Derek prepares to perform his first surgery since his breakdown; Owen has a PTSD episode which injures Cristina and puts their relationship in jeopardy.
Beckett gets a surprise call from the FBI to help out on a kidnapping case, teaming Beckett with her ex-boyfriend which she still has unresolved feelings for; Castle complicates matters by being especially nosy in the investigation.
When a hotshot financial advisor is found shot at a naval station, NCIS investigates the case by interviewing the victim's three-dimensional hologram of herself, which she created before her death