William Ryerson heads the Population Media Centre, which develops serial melodramas with messages: mainly stories that lead people to change their minds about various reproductive health issues. He and Metta agree that television shows are highly influential, informing (or misinforming) people in powerful ways. The best and cheapest way to reduce population growth is through story-telling

Noah Weisbord, a law professor at Queens University, worked on the committee that defined the crime of aggression (previously called "the crime against peace”) that is now an enforceable international law. A ruler who starts a war can be personally arrested, tried, and imprisoned. Noah and Metta discuss the effort to combine forgiveness with justice.

Reiner Braun is co-president of the International Peace Bureau. He updates Metta on the exciting and dangerous current period, when a new world order is developing in which the US is declining and China, among others, is rising. Europe's response to Trump is to go it alone, developing their own military. What will become of NATO?

Paul Beckwith is a Canadian climatologist who produces frequent videos about global warming. While Metta Spencer is especially concerned about where to cultivate an additional trillion trees, Beckwith is more interested in the potential for using the oceans to manage the excess carbon in the atmosphere.

Shubhendu Sharma founded a company in India, Afforestt, to build tiny forests all around the world, using methods developed by the Japanese botanist Miyawaki. They are dense natural forests comprising trees that grew in the region hundreds or thousands of years ago. Metta Spencer asks Shubhendu to estimate the carbon sequestration of his forests but he declines to do so, and they argue a bit over philosophy.

Audrey Hayden, Genevieve Langille, Jasmine McRorie, and Freyja Moser are high school students in London, Ontario. On Friday September 27 they organized a protest march as part of the worldwide campaign to alert humankind to the existential crisis posed by global warming. Every Friday after school they also protest, and here they discuss with Metta Spencer the attitudes of the adults who react to their disruptive actions.

Meir Amor is an Israeli-born Canadian professor in Montreal. Abraham Weizfeld is a political scientist/author who lives in Montreal and Nablus, Palestine. Weizfeld considers the recent elections a significant improvement in that it puts the Palestinian party into a more powerful position. Amor thinks that the changes will not amount to much.

Angela Bischoff is outreach director for the Ontario Clean Air Alliance and Gordon Edwards is president of the Canadian Coalition for Nuclear Responsibility. They share with Metta Spencer their concerns about the hazards and inordinate costs of nuclear power and suggest other options that are being ignored by the government of Ontario, which is continuing a policy of refurbishing old reactors.

Reva Joshee is a Toronto professor and advisor to Jai Jagat, the group that will depart from Gandhi's grave in Delhi on October 2 and march to Geneva Switzerland, passing through Iran, Georgia, Croatia, among other states, to encourage ending social exclusion, poverty, warfare, and global warming. Reva tells Metta Spencer about the plan to other marchers coming to Geneva from Europe and Africa for several days of action, promoted by the United Nations there.

Macdonald Scott is an immigration consultant who helps (mainly disadvantaged) migrants acquire official status as immigrants to Canada. He explains to Metta Spencer that the system is not nearly as generous as most Canadians believe.