Broadcast: Jan. 10-March 28, 1971. Set in 17th-18th century England in the court of King Charles II, John and Sarah Churchill move with adroitness and honesty, becoming the confidants of monarchs. John, first Duke of Marlborough, was a military genius whose brilliance on the battlefield saved England from defeat--just as his descendent Sir Winston Churchill saved England 300 years later. Sarah was an uncompromising beauty with wit, temper and a matching political savvy. Their power grew over the years until they were the virtual rulers during the reign of Queen Anne.