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 1 Riddle of the Right Whale
7.10 60 minutes A dramatic film about Right Whales, the rarest of all the great whales. There's a race on to save them and even US nuclear submarines are part of the effort. Dramatic footage above and below the water reveals these fascinating giants battling for mates, rearing young, sailing with their tails and meeting other whales, dolphins, seals and sharks. It's called the Right Whale because it used to be the right whale to hunt - big and full of blubber. Today it's baffling biologists who cannot understand why, in spite of total protection, it refuses to recover.
