Podcast investigations, as exemplified by the episodes provided, involve in-depth explorations of unsolved cases, unexplained phenomena, and other mysteries. These podcasts often employ investigative journalism methods, such as analyzing eyewitness accounts, official statements, and forensic evidence, to shed light on these complex and unresolved issues.

For instance, the episode 'Introducing Lost Hills: Dark Canyon' previews an investigative series that delves into the unsolved case of Mitrice Richardson, a young woman whose mysterious disappearance and death have led to many unanswered questions and theories. Similarly, the episode 'Miami Mall Aliens' investigates claims of alleged alien sightings, scrutinizing the evidence and debunking certain claims to determine the true nature of the event.

These podcast investigations leverage a range of techniques and resources to uncover new insights and shed light on the unknown, engaging listeners in the process of uncovering the truth.