"Heisenberg"

Werner Heisenberg and his Uncertainty Principle of quantum physics are never mentioned in this eccentric romantic comedy from Simon Stephens, but they provide a heady subtext for an otherwise effervescent character study. A 42-year-old American woman inexplicably kisses a stranger—a 75-year-old British butcher—on a London railway station, kick-starting an unlikely relationship, a search for a missing son, and a beguiling look at the invisible quanta of human connection.