“Breaking Bad” tends to come across as a fairly grounded show, even if it doesn’t always pretend to be a paragon of realism. Sure, there are plenty of unbelievable moments, such as Gus Fring’s (Giancarlo Esposito in his best TV role) eerily composed and grisly death scene or Walter White’s (Bryan Cranston) machine gun antics in the deadly “Breaking Bad” series finale, “Felina.” Even so, the series might feature memorable — and even outlandish — characters, but it retains a gritty overtone that makes it easy for viewers to believe that something like this could plausibly play out in real life.
While…