In Series 4, Jennifer Hynes joins Mike Ferrigan to collaborate and continue the development at Extinction Radio extinctionradio.net
31st March 2019 – Cory Morningstar
6th February 2019 – Jem Bendell
20th January 2019 – Dahr Jamail
5th January 2019 – Peter Wadhams and Vanessa Blakeslee
19th December 2018 – Nicholas Humphrey and Paul Beckwith
5th November 2018 – Kevin Anderson and Paul Beckwith
5th October 2018 – Peter Wadhams
25th September 2018 – Guy Lane
14th September 2018 – Mike Sliwa
4th September 2018 – Paul Beckwith
14th July, 2018 – Nicholas Humphrey
6th July, 2018 – Stuart Scott and Vanessa Blakeslee
28th May, 2018 – Deb Ozarko
7th May, 2018 – Paul Beckwith, Carolyn Baker
3rd April 2018 – Derrick Jensen and Rory Varrato
22nd March 2018 – Peter Wadhams with Mike Ferrigan and Jennifer Hynes
6th March 2018 – Derrick Jensen, Paul Beckwith, Lisa White, Nicholas, William Hawes, Rob Seimetz, Ian Baxter, Mike Ferrigan and Jennifer Hynes
21st February 2018 – Derrick Jensen, Paul Beckwith, Nicholas Humphrey, Rob Seimetz, Ian Baxter, Mike Ferrigan
1st February 2018 – Hambone Littletail, Mike Ferrigan, Jennifer Hynes, Dean Spillane Walker, Derrick Jensen, Paul Beckwith, John Compost Cossham
14th January 2018 – Mike Ferrigan, Jennifer Hynes, Dean Spillane Walker, Derrick Jensen, Paul Beckwith, Peter Wadhams and Carolyn Baker
22nd November 2017 – Mike Sliwa, Derrick Jensen, Paul Beckwith, Vanessa Blackeslee and Hambone Littletail
1st October 2017 – Peter Wadhams and Gene Gibson
12th September 2017 – Paul Beckwith, Tiokasin Ghosthorse
28th August 2017 – Derrick Jensen
28th June 2017 – Derrick Jensen and Paul Beckwith
14th June 2017 – Guy McPherson and Paul Beckwith
31st May 2017 – Peter Wadhams, Paul Beckwith, Carolyn Baker, Dean Spillane Walker, Lisa White
17th May 2017 – Cory Morningstar, Peter Russell, Melissa Golladay, Carolyn Baker, Hambone Littletail and Elizabeth West
5th May 2017 – Deb Ozarko, Jennifer Hynes and Peter Melton
19th April 2017 – Hambone Littletail, Forrest Palmer, Libbe HaLevy
5th Apri 2017 – Dahr Jamail, Mike Silwa, Paul Beckwith
22nd March 2017 – Peter Wahams, Dr Reese Halter, Hambone Littletail
8th March 2017 – Guy McPherson, Kevin Lister, and Paul Beckwith
22nd February 2017 – Nick at Relief Analysis and Paul Beckwith
8th February 2017 – Deb Ozarko, Kevin Hester, Hambone Littletail
25th January 2017 – Michael Sliwa, Hambone Littletail, Stuart Scott
11th December 2017 – Guy McPherson, Kenn Orphan, Carolyn Baker/Andrew Harvey and Paul Beckwith
28th December 2016 – Peter Wadhams, Paul Beckwith, Tim Garret
14th December 2016 – Gail Tverberg, Paul Beckwith
30th November 2016 – Tiokasin Ghosthorse, Guy McPherson/Kevin Hester
2 November 2016 – Deb Ozarko
2 November 2016 – Dahr Jamail