Season 1 contains several vulgar references to homosexuality, consensual incest, and adultery. Sexual grunting and moaning is heard from off camera. One scene depicts an incestuous, consensual, sexual encounter in which a woman's bare back and a side view of her bare breast are clearly seen. A painting is shown of a nude woman in a sexually suggestive pose.

Almost every episode involves some sexuality. Many episodes involve adultery. Couples are interrupted (usually by Troy) while having sex in multiple episodes in earlier seasons. One episode features a man who tape records his wife having sex with other men. He plays the recording for Barnaby.

The episode Night of the Stag contains themes of sexual assault.

A woman is briefly shown looking outside with no clothes on. Bare breasts shown. No male nudity.

Season 12 is the most explicit season in regard to nudity.

Very minor sex references used infrequently throughout.

A woman is shot in the chest and killed with a shot gun, blood is visible. A man is stabbed in the neck and arterial spurting is briefly shown.

Most episodes show dead bodies partially covered by a sheet in a lab. A severed head is found on the ground by a police officer. Definitely would be disturbing to younger viewers.

Throughout the series there is mild violence but most of the murders are offscreen.

A man is shown hanging by a rope.

A got is shot but the effect of it is offscreen.

A man is shown trying to strange another man but fails to kill him.

Dead bodies are shown on the ground.

Other infrequent acts of violence take place such as strangling, drowning and punching.

The whole concept of Midsomer Murders is about investigating crime so expect mild to moderate violence.

Sexual vulgarities such as "bonking" and "arse bandit" are used.

Infrequent mild language such as "hell", "damn" and "bastard" are used.

People are shown smoking and drinking but no other drugs are used.

Some of the murders are disturbing to some but they are brief. Not too violent.

Dark themes throughout.