The podcast episodes provided discuss various cases and theories related to poltergeists, which are a type of paranormal activity involving the movement of objects and other physical disturbances without any apparent natural cause.

For example, the episode 'S4. Case 3: The Platte County Poltergeist' explores a case where a family experienced a series of unexplained and increasingly disturbing events in their home, leading them to believe it might be haunted by a poltergeist.

Another episode, 'Ghost Stories?', delves into the nature of poltergeists, using the famous Bell Witch case as a prime example of this phenomenon.

The episodes also explore related topics, such as the potential connection between Bigfoot sightings and poltergeist activity, as discussed in 'Sasquatch - The Forest Poltergeist - The Paranormal Podcast 825'.