Glenn Kirschbaum

Secrets of the Unknown: Tornadoes

Secrets of the Unknown: Life After Death

Secrets of the Unknown: Nostradamus

Secrets of the Unknown: Amelia Earhart

Secrets of the Unknown: Witches

Secrets of the Unknown: Lake Monsters

Secrets of the Unknown: Dreams and Nightmares

Secrets of the Unknown: Tornadoes & UFOs

Secrets of the Unknown: Hollywood Hauntings