1. Seine   Berlin   Paris   Lisbon   London   Hint Half-n-half Clue   2. Rhine Rhein   Rome   London   Bern   Cologne   Half-n-half Clue   3. Danube   Vienna   Lisbon   Bern   Kinshasa   Half-n-half Clue   4. Tiber Tiber Tevere   Bern   Lisbon   Rome   Cairo   Half-n-half Clue   5. Danube, Sava Danube Sava   Bern   Berlin   Belgrade   Washington D.C.   Half-n-half Clue   6. Tagus Tagus Tejo   Montreal   Belgrade   Lisbon   Bern   Half-n-half Clue   7. Ottawa, St. Lawrence Ottawa St. Lawrence Outaouais   Kinshasa   New York   Montreal   Washington D.C.   Half-n-half Clue