‘Sea of Glass’ Review: A Widow’s Coastal Healing Retreat Turns Into a Stately, Moody Greek Tragedy

There are Greek waves aplenty lapping at the forlorn beachside setting of “Sea of Glass,” though they’re not especially weird ones. Amid a national cinema that has become internationally recognized for perverse plotting and deadpan absurdism, writer-director Alexis Alexiou’s third feature st…