1. Berlin   Zaire (Congo) Zaire Congo   Spree   Yangtze Kiang Yangtse Kiang Yangtze Yangtse Chang Jiang   Tiber Tiber Tevere   Hint Half-n-half Clue   2. Washington D.C.   Hudson   Seine   Tiber Tiber Tevere   Potomac   Half-n-half Clue   3. Cologne   Thames   Rhine Rhein   Seine   Tiber Tiber Tevere   Half-n-half Clue   4. New York   Tagus Tagus Tejo   Hudson   Rhine Rhein   Danube, Sava Danube Sava   Half-n-half Clue   5. Lisbon   Thames   Zaire (Congo) Zaire Congo   Tagus Tagus Tejo   Seine   Half-n-half Clue   6. Paris   Seine   Potomac   Tagus Tagus Tejo   Danube   Half-n-half Clue   7. Bern   Spree   Zaire (Congo) Zaire Congo   Aare   Nile Nile Blue Nile   Half-n-half Clue