As demand for ADHD medication skyrockets, Guyon Espiner asks leading psychiatrist Dr Sam McBride why more people than ever before are being diagnosed with the condition - and to what degree unregulated online testing and Big Pharma are playing in the surge.

Extreme storms and unbelievable heat. Climate science pioneer, Michael Oppenheimer, tells Guyon how weather events will change as the atmosphere heats up - and what we need to do to prepare ourselves. Plus, he tells us what he thinks about soup-throwing climate activists.

The Prime Minister admits he needs to cut back the corporate language after calling people, "customers". Plus, why he allowed the Treaty Principles Bill and his final word on a capital gains tax

Elite SAS commander, Jamie Pennell, on the brutal tactics of the Taliban. Plus the crucial character trait needed to make it into the SAS and the moment he found out he lost a fellow soldier

The rugby great became the face of mental health in New Zealand, so why does he think he’s failed and what does he plan to do about it? Plus, he challenges Guyon to open up about his own health and asks if New Zealand’s macho culture has really changed.

Labour's Barbara Edmonds talks to Guyon about the huge fiscal challenges ahead for NZ and whether it's time to lift the superannuation age. Plus, the heart-breaking backstory that motivated her to get into Politics.

Former White House staffer, John Bolton, on why a second term for Trump would be far worse than his first. Plus, he tells Guyon why it's time for New Zealand to rethink its nuclear-free policy.

Author of “The Subtle Art of Not Giving a F*ck” Mark Manson, talks to Guyon about the potential upsides of AI therapy and the reasons so many Americans idolise Trump. Plus, he reveals how his life completely changed after visiting NZ.

ANZ's Antonia Watson talks to Guyon about billion dollar bank profits, whether we're paying too much for our mortgages and why she thinks it's time for a Capital gains tax.

Geopolitics expert Peter Zeihan tells Guyon what New Zealand needs to do right now if it wants to survive the end of globalisation, why China's days are numbered, and who's going to win the US election.

Champion boxer Mea Motu gets real about what motivates her in the ring, how her kids saved her life, and why she won’t stay silent on domestic abuse.

Waikato-Tainui leader Tuku Morgan tells Guyon why he's so fired about the backlash against te reo, how young Māori have the power to change the future and why he's not sorry about that underwear scandal.

Mental health advocate Mike King tells Guyon why taking government cash is like taking money from Gollum; the day he realised his homophobic comedy was doing real damage, and why kids don't talk to their parents about their mental health.

Jordan Williams from the Taxpayers' Union tells Guyon about the group's funding, its connection to the Atlas Network, and why he once joined the Green party.

Longevity expert Stephen Cave explains to Guyon how living to 150 years old could soon be a reality, and why the consequences of immortality would be horrific for all aspects of our world.

Former Greens Co-Leader James Shaw on why the party should consider working with National in future, why he's been called a "tree Tory", and what he's got planned after politics.

ACT leader David Seymour tells Guyon how it feels being part of the coalition Government, what race-based policies he'd like to change, and whether we can really afford tax cuts.

Film director Roseanne Liang tells Guyon about her huge new Hollywood project, why she's obsessed with Terminator 2, and what movies tell us about humanity.

Community leader and former boxer Dave Letele tells Guyon his thoughts on the new Government's crackdown on gangs, whether bootcamps really work, and if he'll ever get into the political ring himself.

Watch the trailer for 30 with Guyon Espiner - a brand new, in-depth interview show.

30 with Guyon Espiner is an in-depth interview show featuring some of the most interesting and influential people in our world.