Inherit the Viper is an unfortunately titled but acceptably mediocre crime drama about rural siblings Margarita Levieva, Josh Hartnett, and Owen Teague running an opioid business. Levieva’s the merciless boss, Hartnett’s the reluctant muscle, Teague’s the enthusiastic but uninvolved teenager. Everything’s going fine—well, outside the occasional fatal overdose for customers—until Teague decides he’s got to…