Despiteall the stunning visuals, the slam bang action, the pitch perfect performancesand somebrain bending time travel concepts; this is first and foremost a love story. And like all great love stories, the fear of lossgrips its heart. In a season that has featured some amazing ideas and some capitvating stories, suddenly out of left field comes a stand alone episode that may be the perfect Dr. Who story. I won't bother to reiterate the plot orits manyhighlights. See it yourself. Suffice it to say that in a culmination of the many emotional threads running through the Amy/Rory relationship, with this storywe have witnesseda powerful and heartbreakingexploration of true love.