Tugboat Tyre and Sun and Storms

In Britain's biggest port, cargo grinds to a halt as one of the tugboats picks up a mystery object in its propeller and is out of action. A luxury floating hotel in London's Docklands has a rusty bottom and the dive team are charged with making it shipshape once more. Then the team face danger on the water as they attempt to rescue a stricken cruise liner amid one of winter's worst storms.