Tributes to David Letterman, Part 15 of 31: Jack Hanna 1985, 2015

Tributes to David Letterman, Part 31 of 31: Bill Murray 1980, 2015

Jack Hanna’s Into the Wildlights 2019

Fan Request: Jack Hanna's Giant Owl Escapes | Letterman

Tributes to David Letterman, Part 22 of 31: Ray Romano 1995, 2015

Jack Hanna: Right decision was made to kill gorilla

David Letterman's Stupid Pet Tricks - March 22, 1989 - Full Segment

Jack Hanna's Into the Wild

Tributes to David Letterman, Part 28 of 31: Tom Waits 1983, 2015

Jack Hanna Collection on Letterman, Part 8 of 11: 2006-2008

Tributes to David Letterman, Part 17 of 31: Steve Martin 1980, 2015

Tributes to David Letterman, Part 23 of 31: Howard Stern 1984, 2015

Zoo Life With Jack Hanna - South Of The Border - HQ VHS Remaster - Watch in 720p up to 4K @ 60fps

David Letterman Kid Scientist Volume 6 2009

Norm Macdonald on Late Night September 23, 1999

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

Stupid Pet Tricks: The Beer-Buying Dog, A Stupid Cockroach Trick And More | Letterman

Late Show with David Letterman - 4 May 2006 - Julia Roberts & Pearl Jam (FULL SHOW)

Tributes to David Letterman, Part 27 of 31: George Clooney 1995, 2015

Slow Lorus, Black Vulture & More w/ Jack Hanna, Betty White & Amar'e Stoudemire

Unscripted: Jack Hanna regrets 1972 accident