![Jungle” Jack Hanna, zookeeper of late-night, on life as Letterman's animal handler on The Late Show. Jungle” Jack Hanna, zookeeper of late-night, on life as Letterman's animal handler on The Late Show.](http://www.slate.com/content/dam/slate/articles/arts/television/2015/05/last_laugh/150507_TV_JackHannaLetterman.jpg.CROP.original-original.jpg)
Jungle” Jack Hanna, zookeeper of late-night, on life as Letterman's animal handler on The Late Show.
![OFFBEAT with PHIL POTEMPA: Jack Hanna ready to join Letterman for final swan song | OffBeat with Phil Potempa | nwitimes.com OFFBEAT with PHIL POTEMPA: Jack Hanna ready to join Letterman for final swan song | OffBeat with Phil Potempa | nwitimes.com](https://bloximages.chicago2.vip.townnews.com/nwitimes.com/content/tncms/assets/v3/editorial/d/7e/d7ef52cc-9544-5b59-a24c-94ceb75d6753/553978495f4a7.image.png?crop=436%2C327%2C82%2C0&resize=1200%2C900&order=crop%2Cresize)
OFFBEAT with PHIL POTEMPA: Jack Hanna ready to join Letterman for final swan song | OffBeat with Phil Potempa | nwitimes.com
![Jack Hanna 'The Late Show with David Letterman' held at the Ed Sullivan Theatre – Arrivals Featuring: Jack Hanna Where: New Yor Stock Photo - Alamy Jack Hanna 'The Late Show with David Letterman' held at the Ed Sullivan Theatre – Arrivals Featuring: Jack Hanna Where: New Yor Stock Photo - Alamy](https://c8.alamy.com/comp/DXCMPN/jack-hanna-the-late-show-with-david-letterman-held-at-the-ed-sullivan-DXCMPN.jpg)
Jack Hanna 'The Late Show with David Letterman' held at the Ed Sullivan Theatre – Arrivals Featuring: Jack Hanna Where: New Yor Stock Photo - Alamy
![Jack Hanna 'The Late Show with David Letterman' held at the Ed Sullivan Theatre – Arrivals Featuring: Jack Hanna Where: New Yor Stock Photo - Alamy Jack Hanna 'The Late Show with David Letterman' held at the Ed Sullivan Theatre – Arrivals Featuring: Jack Hanna Where: New Yor Stock Photo - Alamy](https://c8.alamy.com/comp/DXCMPX/jack-hanna-the-late-show-with-david-letterman-held-at-the-ed-sullivan-DXCMPX.jpg)