PsychoPhone; War Dog Letter; Pancho Villa Watch Fob History Detectives : Season 7 Episode 1

Season 7 begins with a closer look at the "Psycho-Phone," a device presumed to have been built by Thomas Edison and was designed to communicate with the dead. Then, a WWII letter between two soldiers which talks about a third man's qualifications to become a dog trainer. Lastly, a watch fob which commemorates Pancho Villa's infamous raid on Columbus, New Mexico in 1916.