Melodramatic romance of ‘The Mountain Between Us’ elevated by its stars

The romantic drama “The Mountain Between Us” shows what great talent can do to so-so material, as two powerful actors and a thoughtful director give weight to the sort of overwrought melodrama that otherwise would have landed on cable TV.The set-up is laughable, but quick. In an airport in Idaho, a neurosurgeon, Ben Bass (Idris Elba), is desperate to get a flight to Baltimore, where a little boy needs surgery. At the same airport, journalist Alex Martin (Kate Winslet) is trying to bo