Denethor was the Steward of Gondor and heir to the Throne .
Meanwhile , the wizard Gandalf the White and the hobbit Pippin arrive at Minas Tirith to warn Denethor , the Steward of Gondor and heir to the Throne , about the upcoming war�only to discover that the Steward has become insane and means to take his own life .
The Return of the King -LRB-1980 film-RRB-