Cursed keeps it light when it comes to profane language (you'll hear a "sh*t" and "piss" here or there), but it gets dark as everyone chases after control and power. We see adult themes revolving around excess, violence, and revenge. Merlin copes with his troubled past by drinking copiously, especially in the first couple of episodes. The Red Paladins exert their power over others through torture, even keeping a child as a hostage. And King Uther, upon discovering the truth about his background, plots revenge accordingly.