This show is centered around the fascinating life of a Meister Frantz Schmidt, an executioner from the Early Modern Era Germany, who had skills in torture, executioning, and the art of healing.
Below is the affiliate links to books that go into greater depth of the show topic.
For an awesome historical fictional (but based on facts), I highly recommend the series, The Hangman's Daughter, by Oliver Potzsch.
Here are some pictures of Frantz Schmidt.
Here Meister Frantz nips prisoner with hot irons on the way to be executed.
Here are some pictures from Hans von Gersdorff’s Fieldbook that Frantz might have learned his physician skills from.