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History Detectives History Detectives | Season 7, Episode 1 | Psychophone

History Detectives | Season 7, Episode 1 | Psychophone Did Thomas Edison invent this machine to unlo... Did Thomas Edison invent this machine to unlock the secrets of the dead? (15:01)

  • Duration: 15:01
    Copyright 2009 The Public Broadcasting Service
    TV Rating: TV-PG

History Detectives History Detectives | Season 7, Episode 1 | Introduction

History Detectives | Season 7, Episode 1 | Introduction Psychophone; War Dog Letter; Pancho Villa Wat... Psychophone; War Dog Letter; Pancho Villa Watch Fob (16:16)

  • Duration: 16:16
    Copyright 2009 The Public Broadcasting Service
    TV Rating: TV-PG

History Detectives History Detectives | Season 7, Episode 1

History Detectives | Season 7, Episode 1 Psychophone; War Dog Letter; Pancho Villa Wat... Psychophone; War Dog Letter; Pancho Villa Watch Fob (54:50)

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