Tristan + Isolde is an everyday story of medieval folk, concerning the dastardly schemes of Irish King Donnchadh to defeat Lord Marke of Cornwall's benign plans to unite England under a single, peaceable rule. Caught up in the imbroglio are Donnchadh's daughter Isolde (Sophia Myles) and Mark's adopted son, Tristan (James Franco), who fall in love when he's washed up in Ireland. Halfhearted, thin-blooded, more sword in scabbard than tongue in cheek, it inevitably brings Wagner to mind. I refer not to Richard Wagner of Bayreuth, but to Robert Wagner of Hollywood, who appeared in the title role of that early CinemaScope Arthurian romp, Prince Valiant.