Hail the conquering hero. Josh returns after nailing down details for a trade agreement. But the devil in the detail, including information kept from Josh. C.J. fights megamedia ownership of local TV.

Santos engineers a plot to get a stalled stem-cell bill scheduled for a vote in the House. President Bartlet has an uncomfortable reunion with a rival economist with whom he split the Nobel Prize. A group of underage kids tries to convince Toby they deserve the right to vote. Kate tries to resolve a silly border dispute with Canada before there is bloodshed.