Possible Clues:

• The aughts, e.g
• The '60s, e.g
• Dog's in river for a period
• Period of time
• Greatest hits album by Duran Duran
• Rotter in river for extended period
• Helper on vessel talked of for a number of years
• Immoral to ignore series of religious books some years
• Twenties or fifties, but not fives
• 33-Across years