Dexter (2006)

Dexter's forensic job and carefully performed social routine give him a place inside ordinary life while he conceals being a serial killer. The original Dexter makes access, timing and the expectations of colleagues and family part of that concealment. Choose it for a macabre crime drama where appearing unremarkable is skilled work. It is violent and ethically manipulative by design; begin with the 2006 series rather than one of its later extensions.