On the Brink
- Episode aired May 12, 2012
- TV-G
- 21m
![Jack Hanna's Wild Countdown (2011)](https://m.media-amazon.com/images/M/MV5BMjQwNjE1Nzk4OF5BMl5BanBnXkFtZTgwNDAxNjQ2ODE@._V1_QL75_UY281_CR93,0,190,281_.jpg)
Jungle Jack experiences some of the world's most magnificent animals that are also the most threats.Jungle Jack experiences some of the world's most magnificent animals that are also the most threats.Jungle Jack experiences some of the world's most magnificent animals that are also the most threats.