<P> Ian returns the Declaration and asks for the next clue, but when Ben remains coy, Ian reveals he has kidnapped Patrick as a hostage . They go inside Trinity Church where they find an underground passage but it appears to lead to a dead end lit by a lone lantern . Patrick claims it is referencing the Midnight Ride of Paul Revere, pointing Ian to the Old North Church in Boston . Ian leaves Gates trapped in the chamber, heading for Boston . Patrick reveals the clue was a fake, then enter the treasure room but it seems looted . After a heart to heart between Ben and Patrick, they find a notch which the meerschaum pipe fits into, opening a large chamber containing the treasure, then escape through the back exit . Ben contacts Sadusky, actually a Freemason, surrendering the Declaration and the treasure's location in exchange for clemency . Ian is later arrested when Ben tips the FBI off . </P> <P> Later, Ben and Abigail have started a relationship . Meanwhile, Riley is somewhat upset that Ben turned down the 10% finder's fee for the treasure but accepted a much smaller amount, which still has netted them all significant wealth . </P> <Ul> <Li> Nicolas Cage as Benjamin Franklin Gates: An American treasure hunter and cryptologist . </Li> <Li> Sean Bean as Ian Howe: An entrepreneur and treasure hunter who is a former friend of Benjamin Gates . </Li> <Li> Harvey Keitel as Agent Peter Sadusky: A FBI Special Agent in charge of the theft of the Declaration of Independence . </Li> <Li> Jon Voight as Patrick Henry Gates: A former treasure hunter and the father of Benjamin Gates . </Li> <Li> Justin Bartha as Riley Poole: A sarcastic computer expert and best friend of Benjamin Gates . </Li> <Li> Diane Kruger as Dr. Abigail Chase (Ph. D .): An archivist at the National Archives who aids in Benjamin Gates treasure hunting . </Li> <Li> Christopher Plummer as John Adams Gates: The father of Patrick Gates and the grandfather of Benjamin Gates . </Li> </Ul> <Li> Nicolas Cage as Benjamin Franklin Gates: An American treasure hunter and cryptologist . </Li>

Who plays nicholas cage's dad in national treasure