The Wreck of the Mary Deare

When ship captain John Sands (Charlton Heston) encounters the Mary Deare, an apparently abandoned ship, on the open seas, he hopes to salvage the wreck. Boarding the vessel, however, Sands finds that the Mary Deare's captain, Gideon Patch (Gary Cooper), is still aboard the ship, behaving strangely and clearly not well. After the damaged craft sinks, Sands and Patch attempt to prove to a court that the ship was sabotaged, but shocking revelations eventually come to light.