Common Sense Note
Parents need to know that, even though it's technically a period drama, Copper isn't that much different than modern crime shows when it comes to iffy content. Crimes are bloody but not excessively so, and they involve both adult and child victims (and, in one case, the rape and murder of a child). You'll also see realistic stabbings, shootings, and other forms of assault, along with characters who use weapons. Characters participate in prostitution, too, whether as customers or solicitors, which spawns simulated sex and some partial nudity (including bare buttocks, sides of breasts, etc.). Characters also drink and smoke onscreen and use coarse language (think "d--k").
Simulated sex with partial nudity (bare buttocks, the side of a breast, etc.). Many characters participate in prostitution, either as customers or solicitors.
Characters use guns and other weapons, and there are realistic shootings, stabbings, and other forms of assault against both adults and children. Crimes are bloody but not excessively so. Some cases involve sex crimes, with at least one involving the rape of a child.
Light use of coarse terms like "d--k."
The characters inhabit a world that's corrupt and dangerous. Money buys power and privilege, and those who enforce the law aren't always ethical. "Good" and "bad" are relative.
Drugs / Tobacco /
Characters drink socially (often to excess) and smoke onscreen.