The Best of "Jungle" Jack Hanna | Letterman

Jack Hanna's long goodbye: How Alzheimer's is stripping away the man the world once knew

Jack Hanna Collection on Letterman, Part 1 of 11: 1985-1986

Jack Hanna Bitten by a Beaver - David Letterman December 1988

Animal Bloopers with Jack Hanna (1994) (VHS)

Jack Hannah on Ellen DeGeneres

Jack Hannah on FIRE with four huge goals