This episode explores Civil War espionage, starting with the intelligence operation and spies on the Union side. Allan Pinkerton, Kate Warne, Timothy Webster, and Col. George Sharpe feature prominently in this episode. A follow-up episode will be out soon finishing up our look at Union spies with figures like Elizabeth Van Lew, Lafayette Baker, Mary Richards Bowser, Pauline Cushman, and Sarah Emma Edmonds.

A future show will discuss Civil War spies on the Confederate side.

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