While investigating a deadly freight train accident, Don and Charlie discover a shocking culprit who is on a mission to diminish public confidence in the railroad system.
A body is found in a pottery store in what's apparently a robbery that was interrupted.
When a single human bone is discovered in the desert, Grissom and Catherine must cover miles of territory to find the rest of the skeleton.
Leo fails to convince Bartlet of the merits of an expensive but unproven missile defense system. Meanwhile, Leo and the others are irritated by the news that pompous Lord John Marbury has been appointed ambassador from Great Britain. Toby clashes with Sam over the President's speech for an environmentalist group. C.J. convinces a controversial comic to refuse a White House invitation.
Leo fails to convince Bartlet of the merits of an expensive but unproven missile defense system.
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