First Half: George Noory welcomes Larry Arnold, the founder of Parascience International, who has spent years investigating inexplicable episodes of spontaneous human combustion. He’ll explore some of the strange cases he's researched, what may cause these bizarre events, and his encounters with first responders who witnessed what seemed impossible.

Second Half: Joel Waldman is an Emmy Award-winning broadcast journalist and co-host of the hit true-crime podcast Surviving the Survivor. He’ll discuss the infamous Jack the Ripper case, the unidentified killer who terrorized London’s East End in 1888. He'll also examine other notorious murderers, their victims, and what drives these horrific crimes.