Documentary revealing the secret childhood of Queen Victoria's eldest grandson, the future Kaiser Wilhelm II, through a long-hidden cache of intimate family letters. Wilhelm was born with a permanently paralyzed arm - a disability considered shameful at the time - and was subjected to a series of bizarre and often cruel attempts to cure the condition. These childhood experiences are believed to have helped create a highly dysfunctional connection between the boy and his mother, Victoria, Princess Royal, and to have shaped his love-hate relationship with her country.

• Nick London

• Helen Castor
• Arthur Williams