First off: There is nothing morally wrong with watching a show that looks at "historical" execution methods then tests the device to see if it actually could have been used in reality. Seriously, I can not believe two of the three previous reviews trashed the show for its morality. This isn't Wicked City. It isn't glorified violence for its own sake. It's a historical version of myth-busters for execution devices. In fact....
Machines of Malice is like a historical version of Mythbusters, except only dealing with execution and torture devices. Sure, some may not like the subject matter; that's why there are different channels. The guy host and Michele Boyd have good chemistry together and they both seem to be having fun during the show. (Is this where I confess to crushing hard on Michele Boyd when the show first came out?) If you are interested in historical crime and punishment, or if you like Mythbusters, do yourself a favor and watch this show if you happen to find it. Speaking of, if you know where to find it (complete and legal!) please let me know. I just tried to get it from Apple, but no dice.