Murder by Shark

436 people died in 1852 when the HMS Birkenhead unexpectedly crashed into a rock, many eaten by blood thirsty sharks. What caused the ship to crash in a well known passage? Who knew about gold hidden in the ship's hull? Why were 100s of sharks following the ship? Naval historians, shark scientists and treasure hunters shed new light on a deadly conspiracy and the search for 3 tons of missing gold.