Shepherd Paris enters a gladiatorial contest and is revealed as heir to a kingdom. He falls for Helen, the wife of Greek king Menelaus, sparking a great war between Greece and Troy., Conclusion. Sparta attacks Troy and war rages, until a wily plan is hatched by the Spartans to defeat Troy from within. Rufus Sewell, James Callis. Helen: Sienna Guillory. Paris: Matthew Marsden. Hector: Daniel Lapaine.