Cast
Travel from freezing poles to tropical rainforests to meet nature’s most captivating giants, who prove being big comes with enormous challenges.
Tom Hiddleston (Acting)
4 December 2020
3 December 2022
21 April 2019
2 May 2018
17 April 2011
1 October 2006
15 April 2014
24 September 2007
6 May 2019
24 June 2015
17 September 2021
25 July 2010
22 September 2004
2 October 2016
6 November 2001
31 March 2017
17 September 2013
12 September 2013
13 October 2017
8 February 2015
21 April 2023