“Unsinkable” (** out of four) was a dull melodrama set at the backdrop of the Titanic investigation in which various crew members and personnel (Fiona Dourif, Karen Allen, Brendan Griffin, and others) were called into question in court mediation finding out what went wrong and why. Fascinating historical story is given banal execution and (pun intended) sinks under its own weight. Hard-core historians might find more of merit here but general film lovers won’t find any of the golden or classic drama or acting of “Titanic.”