There isn't a lot of sexual references. There is no nudity. A husband and wife kiss and hug throughout the series A man and woman kiss in an office
There is violence throughout the series (not a lot) but not intense or graphic. The first episode there is an explosion which kills a lot of important people. There is a lot of gun fire which is usually directed at the president.
Not a lot of language. Maybe the occassional 'ass' the 's**t'
There is a few scenes where people are drinking, most of the time it is a victory drink. A young boy, about 16-18 years of age, is dealing drugs at a nightclub.
The whole series is built on suspense. It keeps you on the edge of your seat. The aftermath of the main explosion maybe distressing to some viewers.