Knowledge often equates to power, but knowledge also can be tightly aligned with mystery, conspiracy and perhaps even murder. That link is explored in "Deadly Intelligence," which investigates whether the deaths of brilliant scientists and inventors were the results of unfortunate coincidences or if they were murdered for knowing too much. Each hourlong episode unravels cases that have either been deemed closed or cold, while others are viewed as ongoing conspiracies based on bizarre circumstances, significant holes in investigations, and possible motives for murder. CIA biological research scientist Frank Olson, "Death Ray" father Nikola Tesla, Jet Propulsion Lab co-founder Jack Parsons, and American researcher Shane Todd are among those whose stories are told.