Plenty of innuendos, implied sex, and direct talk about sex are voiced by the various characters throughout the series. Pornography and masturbation is mentioned in passing.

Women are frequently shown throughout the seasons in scantily clad outfits that at times reveal part of their buttocks and lots of cleavage along with several scenes in lingerie. Men (mostly ripped) are often shown topless or almost naked. Women are shown fighting in revealing/scantily clad outfits in several episodes. Women use their sexuality to manipulate men to get what they want in several scenes. Men are shown staring at women who are wearing revealing clothes and saying sexual things about them. Couples are also seen in bed together implying they have had sex.

[Season 3]

Compared to Season 2, sexual humor being depicted from the Buy More characters is noticeably less this season.

Only two lewd phrases, 'sausage fest' and 'pound town' were uttered in passing by Lester and Jeff, better known as the chief "Buy Morons". Furthermore, the sexual innuendos in these phrases are relatively oblique and hence they may not be readily accessible to younger viewers.

[Season 4]

There are some mild sexual references in some episodes such as "open your mind to what sex truly is" and "it's a sex-crazy orgy where they dont want you to see their faces".

[Season 5]

In the final season of 'Chuck', some sexual references occur in a few scenes. For example, in one scene, Casey (a male spy working for Chuck) and Verbanski (female rival spy) are depicted kissing in a room before the screen fades to black. In the subsequent scene, Verbanski is seen buttoning up her shirt, implying that the two of them just had sex.

Apart from this, in one of the episodes, Chuck and Sarah stumble upon a nudist cult while making their way through a forested area. Several members of the cult who are nude are seen performing a warming-up exercise. No details can be seen as their breasts and groin areas are 'pixelated'. Chuck and Sarah decide to join the nudists and appear in the next scene without any clothes on them. Similarly, their breasts and groin areas are 'pixelated' so no details of the nudity are depicted.

Some scenes involve torture, especially the latter half of Season 2 which is significantly more dark than most of the series, including a character being punched, whipped (with bloody results), and beaten with a metal pipe. Despite this series having very little blood, some of the fight scenes can be quite brutal and hard to watch.

Frequent martial-arts 'esque fighti scenes are depicted throughout the series. A lot of hand-to-hand combat (including use of weapons such as knives) scenes are also depicted, but these scenes lack blood and gore. When guns are involved, it's slightly more graphic. But it never gets high enough to level with shows like Fringe or NCIS. Some explosions, car chases, car crashes, etc. Despite the dead bodies depicted in the series, it never lingers on them or shows graphic and bloody details.

[Season 3]

Season 3 has more action sequences than Season 2.

Almost every episode has at least one fight scene. However, these scenes tend to be short and milder than Season 2's fight sequences.

Most sequences involve fast-paced kicks and punches where the bad guys are quickly taken down. These create the excitement and entertainment without escalating into threatening content for younger viewers.

[Season 4]

There are some scenes of mild violence, in the form of hand and leg combat, and gun shooting with little bloodletting.

[Season 5]

In each episode, the main characters have to fight against various villains, such as spies from other agencies. These combat sequences depict either hand-to-hand (melee) fighting scenes between the characters, or gun battles that contain realistic sound and visual effects. However, these combat sequences are brief and do not contain details such as blood.

Some mild profanity, but nothing too bad.

Mild bad language such as 'b*tch' and 'what the hell' are said by the various characters.

Some scenes depicting social drinking is about as heavy as this series gets.

The season finales can be quite intense with season long plot lines culminating in sometimes nerve racking ways. Season 3 is darker and more intense than the others, although it is still a comedy and is generally pretty lighthearted.

Never frightening, but some of the life or death situations might be intense. There is always something at stake and something to lose, usually at the end of each season.