What is a castle? -- Early castles -- A castle grows -- Who lives there? -- Food glorious food -- Time out -- Under siege -- Tricks of defense -- Lock 'em up -- The knight -- Knight school -- All wrapped up -- In shining armour -- Weapons of war -- Joust for fun -- Heraldry -- The Crusades -- Moorish castles -- Asian castles -- Towering strengths -- Castles today.