seasons 1-3 no nudity but in season 4 that changes. You don't see nipples but there is a pretty long sex scene between two women.

Women occasionally shown in only bras or underwear

Season two has a brief scene where a woman is in a shower and her breasts can be seen. It is very brief and dark, but you can make it out easily.

Some blood and injury detail.

Seasons 1-3 had mild profanity but season 4 has a lot of F words

Frequent drinking, smoking.

Show centers around fighting demons and other dark creatures, and can be quite graphic and violent at times