The 1000th All Black talks frankly about the brutal toll of rugby, life with early-onset dementia and his battles with alcohol. He outlines how the sport should change and recalls the circumstances in which he left to play - and stay - overseas.

Oh, and he explains why he doesn't want to ditch his 1992 Nissan Patrol!

(Carl also offered his thoughts on New Zealand's Rugby World Cup prospects, but it's only fair to point out the interview was recorded before the All Blacks' record defeat, to South Africa.)

Warning: Discusses suicidal thoughts and alcoholism. For free help, text or call 1737, 24 hours.

Carl Hayman's memoir Head On, written with Dylan Cleaver, is out now.

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CREDITS

Host: Simon Bridges

Producer: Jen Black

Audio editing and mixing: John Ropiha

Executive producer: Chris Reed