The topic 'Theories and suspects' is central to the podcast episodes provided, as they delve into the details and investigative efforts surrounding each case of mysterious disappearances from bus stops, while highlighting the lack of resolution and lingering questions.

In the episode MISSING: From a Bus Stop, the hosts explore several unsolved cases and the various theories and potential suspects, including abduction, runaway scenarios, and involvement of known associates or strangers.

Similarly, the episode Theories from the podcast 'Truth Be Told Presents: She Has A Name' explores four theories about who could have committed the gruesome murder of Anita, with a focus on the family's primary suspect, Leroy Lyons, a man with a violent history who was involved with Anita.