The motive in murder-for-hire plots may vary from case to case, but for the hired hit man it’s always business as usual. Investigation Discovery takes a look at the sinister world of contract killings in Nothing Personal, a new series on Wednesdays at 10pm ET/PT about mafia disloyalties, romantic infidelities, stale friendships and the trio of characters at their center: the conniving “client,” the professional murderer and the victim who never saw it coming.

Each one-hour episode is hosted by true crime aficionado Steve Schirripa, whose mobster character Bobby Baccalieri was famously whacked on The Sopranos. Schirripa, who grew up on the fringes of the mob, had schoolmates who became hit men or, unfortunately, succumbed to the work of hit men. Seamlessly woven into the presentation of each story, Schirripa’s commentary exposes viewers to an insider’s view of the business of crime. Why did the victims have contracts on their lives? Who wanted them dead? And how did the hit men carry out their gruesome assignments? Viewers will meet the key players in each story and experience every side of the tale before learning how these doomed relationships fatefully resulted in murder-for-hire.

Check out an episode guide for Nothing Personal, learn more about host Steve Schirripa and watch as hit man “Big Sal” talks about one of his contracts.