Portrayed by Sean Bean is a treasure hunter who is after the Free Mason Treasure and does not care who he has to kill or what he has to destroy to do so. Ian finanices a trip to the Candian ARTIC where Ben Franklin Gates says there is a treasure waiting for them. Instead there is just another clue and it leads to the Decloration of Independance. Ian says the only way to see the back where the clue is to steal it and instends to do so. When Ben and his friend Riely Poole say they do not want any part of it he tried to kill them leaving them for dead and heads for Washington D.C.
Washington D.C.
At the Watergate Complex Ian along with some henchmen create a plan to steal The Decloration. However Ben to save the document beats Ian to it.
Philadelphia
Ian figures out that the next clue leads to Philadelphia where after being outsmarted at the Liberty Bell by Gates and his friends by stroke of luck has the Decloration and goes to New York City where the next clue leads.
New York
Ian has to make a deal with Gates friends becuase only Gates can figure out the final clue. It leads to Trinety Church in New York and to make sure that Ben and his friends do not pull a double cross on him he kipnaaps Ben's father Pattrick Henry Gates. The two Gates however trick Howe into thinking there is one last clue which leads to the Treasure at the Old North Church in Boston.
Boston
The treasure which was always in Trinety Church is found by the Gates who tell the FBI that Ian and his henchmen are at the Old North Church in Boston where he is caputred