He considers how the Mount Rushmore monument in South Dakota works as a sculpture.
Alexander looks at the work dearest to his heart - the Wallace Monument in Stirling.
Looking at the great Danish sculptor Bertel Thorvaldsen and his statue of Christ and the Apostles.
Looking at one of the great banes of the sculptor's life - the monument that is designed and planned, but never commissioned.
He considers Alfred Gilbert and his little-known tomb to the Duke of Clarence, the eldest son of King Edward VII, who died of pneumonia in 1892.