Season
- Season 0 1984-09-24
- Season 1 1983-10-30
- Season 2 1984-05-06
- Season 3 1984-11-04
- Season 4 1985-09-15
- Season 5 1986-10-05
- Season 6 1987-09-20
- Season 7 1988-09-18
- Season 8 1989-10-01
- Season 9 1991-01-06
- Season 10 1991-11-24
- Season 11 1993-01-03
- Season 12 1994-02-20
- Season 13 1994-11-27
- Season 14 1996-01-14
- Season 15 1996-10-06
- Season 16 1997-10-19
- Season 17 1998-10-11
- Season 18 1999-10-03
- Season 19 2000-10-08
- Season 20 2001-10-07
- Season 21 2002-10-13
- Season 22 2003-10-12
- Season 23 2004-10-14
- Season 24 2005-10-19
- Season 25 2006-10-18
- Season 26 2007-04-04
- Season 27 2008-01-04
- Season 28 2008-11-11
- Season 29 2009-10-28
- Season 30 2010-07-08
- Season 31 2011-08-01
- Season 32 2012-07-19
- Season 33 2013-05-17
- Season 34 2014-04-11
- Season 35 2015-02-24
- Season 36 2016-04-14
- Season 37 2017-03-20
- Season 38 2018-03-31
- Season 39 2019-04-07
Season 39 Episode
- Season 18 Riddle of the Right Whale
- Season 18 Hokkaido: Garden of the Gods
- Season 18 Elephants of the Sand River
- Season 18 In the Company of Bears
- Season 18 The Millennium Oak
- Season 18 The Temple Troop
- Season 18 Wild Indonesia: Island Castaways
- Season 18 Wild Indonesia: Underwater Worlds
- Season 18 Wild Indonesia: Magical Forests
- Season 18 The Tiger's Tale
- Season 18 The Wolf's Return
- Season 18 Monkey Warriors
- Season 18 Dangerous Australians
- Season 18 The Crater: Africa's Predator Paradise
- Season 18 Salmon: The Silver Tide
- Season 18 Claws
- Season 18 The Story of an African Wild Dog
Natural World - Season 18 Episode 15 Salmon: The Silver Tide
7.10 60 minutes The salmon that fill the rivers of the Pacific coast of North America have one of the most miraculous and mysterious life-cycles in the entire animal kingdom.
After years feeding in the Pacific Ocean, they travel thousands of miles back to the rivers of their birth to spawn and to die. Using miniature underwater cameras, 'The Silver Tide' reveals the drama and danger of the salmon on their last great journey, as they encounter and overcome fishing nets, hungry bears, raging floods and massive waterfalls. Each year, despite these obstacles, millions of fish reach their final destination, and in doing so, sustain one of the most beautiful and wild landscapes on Earth.
