At the University of Montreal's Dream Engineering Lab, scientist Michelle Carr works through the night trying to better understand why we dream – and especially why we experience nightmares. She says we too often dismiss bad dreams as "just dreams," when they're actually real experiences with real effects. Carr joins Piya Chattopadhyay to discuss the latest developments in sleep science, and how we have more control over our dreams than we may think.

• Host Piya Chattopadhyay speaks with political strategists Jordan Leichnitz and Zain Velji, along with pollster James Valcke, about what the federal NDP needs to do to rebound as the party picks a new leader

• The Washington Post data reporter Jeremy Merrill and linguist Naomi Baron explore how artificial intelligence is creeping into our written world

• The Economist's Middle East correspondent Gregg Carlstrom and the International Crisis Group's Ali Vaez unpack the latest news and state of negotiations in the United States and Israel-Iran war

• Michelle Carr from the University of Montreal's Dream Engineering Lab shares developments in dream and nightmare science and tips on how we can influence our sleeping mind

As he celebrates his 90th birthday, David Suzuki is reflecting on the lessons he's learned from his decades of science communication and environmental activism. The former host of CBC's The Nature of Things joins Piya Chattopadhyay to talk about what made him the orator he is today, the current state of the environmental movement, and how he's changing his approach to climate action as science indicates we have failed to heed past warnings