hello ,

there's two ways in which we can think upon.

number 1- their work is very interesting ,.Surveillance means sitting where no one will look and observing what people do when they think no one's looking. I know I made it sound like an adventure and their life is no less than an adventure.

but on the other hand-

number 2- they constantly have to change city to city, phone number to phone number , vehicles to different vehicles and what if they are married, you can imagine the situation quite well

so, some part of their life is like what we see in movies, but the rest of their life is very adventurous but difficult,

hope that helps