There's one scene where a woman is totally topless but you don't see anymore than a silhouette.

Early in the show, there's a scene where Mandy is undressed sitting at night in front of a fire. She sits meditating in front of the fire with legs spread and what looks like see through white underwear though somewhat dark and distant. She is also topless, but nipples are barely covered by her hair.

Sexual content and references are kept to a minimum low in Seasons 2 and 3.

Characters of both genders are seen in various states of undress (no explicit content). Naked characters are sometimes seen in bed, with lots of skin but no sensitive areas shown.

Several characters have sex offscreen. There are brief men/women and women/women make-out scenes. (Mainly in Season 1)

The term "screw" is used sexually, and there is lots of mention of people sleeping together, having affairs, etc.

In the first season, two characters are shown having sex. However, the shot only lasts for a few seconds and the characters are mostly covered with bedsheets. A second sex scene later on in the season lasts several minutes. Mostly passionate kissing shown.

Elisha Cuthbert wears a top through which her nipples can be identified. This happens at least twice across seasons. (Season 1 and 2) In one of the scenes, she is shown wearing panties and a top. (Season 2)

A man and woman can be seen in the mirror having sex in season 8, but no sensitive areas can be seen.

In season 5, we see a 13-year-old girl who has been kept as a sex slave by a much older man. She has many bruises and marks on her body.

Despite being the shows primary protagonist, Jack Bauer is seen to be extremely ruthless and will stop at nothing in getting the answers he needs. This includes physically torturing suspects and also mentally torturing them by threatening their families, including children.

There is so much violence that the season 1 finale and some other episodes later on have an excessive violence warning.

Given that there is almost 200 hours of footage, it would be near impossible to describe every scene of violence that occurs in the show. That being said, scenes of shooting, stabbing, explosions, and/or torture are a given in almost every episode.

The main character Jack Bauer has a recorded 233 kills across the seasons with 4/5 kills as a result of gunshots and nine kills from season two onwards as a result of neck breaking. The shooting scenes usually do not show blood explicitly and usually has the person just fall to the ground.

For a brief overview suspect are interrogated usually are injected with a type of chemical that induces pain. Jack Bauer breaks a man fingers one by one, cuts man's finger off by one, shoots a man in the kneecap.

Some of the more "extreme" episodes feature viral outbreaks, plane crashes, toxic gases, hostage takings, and nuclear detonations.

We see several bloody bullet holes in various parts of peoples' bodies.

A man digs into another man's stomach with his bare hands to retrieve a computer chip.

A man slides a knife into another man's kneecap.

A man is graphically shot in the head with a sniper rifle.

A man's arm in amputated offscreen.

In season 8, we see many graphic images of men who have been tortured and killed by Jack Bauer, including some graphic torture scenes.

Pretty mild. The word "damn it" "hell" or the phrase "son of a bitch" is used in most episodes.

Very brief uses of strong language: "Asshole", "Goddamn", and "Dick" are all said once throughout the series.

"Fuck" is only said one single time, in the season 4 prequel.

Morris O'Brian, a character that appears in four seasons between five and eight, is a recovering alcoholic. At one point, while stressed out over his job at CTU, he buys a bottle of liquor. However, he doesn't take a drink from it and his sobriety is left untarnished.

With the exception of season three, 24 contains only small, infrequent incidences of drinking, smoking, and drugs.

The story-line of season 3 revolves around drugs. There are several graphic scenes of characters shooting up heroin. Nevertheless, the pain and torment characters experience from using drugs puts substance abuse in a very negative light.

A major sub-plot is Jack Bauer's addiction to heroin.

When a woman's arm is broken, another character shoots her up with an IV using narcotics as a painkiller.

Each season involves some sort of terrorist threat. This includes biochemical weaponry, nuclear weaponry, and assassination attempts made against various public figures.

The torture scenes could be described as "intense".

Several characters have intensely emotional death scenes. The majority of the show is based off of major characters being harmed or being in peril, and it is very rough to watch when main characters are killed graphically.

The entire series is very intense due to its non stop nature.

Many (most) characters have met an untimely death.

In season 8 there is a scene where a man is tortured and gutted and there is a lot of blood involved.