In episode one of the Threat Modeling podcast, host Chris Romeo explores various definitions of threat modeling gathered from industry experts. The podcast discusses whether risk assessment and threat modeling are the same, the essence of threat modeling, collaboration and documentation, identifying and mitigating threats early, the Five W's and an H approach, structured brainstorming, and proactive security. The Threat Modeling Manifesto's definition is favored by Chris, which states that threat modeling is "analyzing representations of a system to highlight concerns about security and privacy characteristics." In addition, the podcast highlights that threat modeling involves art, science, collaboration, and brainstorming, aiming to improve security and privacy in systems.