- HDSI - Civil War Sabotage? The steamship Sultana exploded without warning one night in 1865, killing 1,800 people.
- HDSI - The Disappearance of Glenn Miller In 1944, bandleader Glenn Miller boarded a plane for Paris and was never seen again.
- HDSI - Texas Servant Girl Murders Before Jack the Ripper, a serial killer walked the streets of Austin, Texas.
- HDSI - Who Killed Jimmy Hoffa? Notorious teamster boss Jimmy Hoffa disappeared without a trace in 1975. Was he murdered?