Extras

    Video thumbnail: Secrets of the Dead Speed, Submarines, and Espionage

    Secrets of the Dead

    Speed, Submarines, and Espionage

    The German navy used speed in the form of chewing gum to stay awake for more than 48 hours

    Speed, Submarines, and Espionage

    Video thumbnail: Secrets of the Dead Preview | World War Speed

    Secrets of the Dead

    Preview | World War Speed

    Follow historian James Holland as he unearths the truth about amphetamine use in World War

    Preview | World War Speed

    Video thumbnail: Secrets of the Dead Blitzkrieg on Speed

    Secrets of the Dead

    Blitzkrieg on Speed

    Historian James Holland and his team attempt to walk 22 miles wearing full WWII regalia.

    Blitzkrieg on Speed