Aaaah, this is "Spooks" in the UK, and is a good fun show.
You have "pursed lip woman" (Hermione Norris) in the more recent incarnations. A woman who exists on tow facial expressions for a career. But we forget how long it has been running so not sure which one you are watching.
Standard show goes like this:
Old Boss Man
I am going to meet my opposite number in Russia / Libya / shaskdhks_astan on a rooftop in London as that does not look suspicious at all
Old Woman who should have retired, but keeps on shagging Old Boss Man
I should really retire, but then I shoot someone, feel bad about it yet I save the day and therefore stay another episode *looks wistful*
Young Buck Man
I may work for MI5, but I have a heart. This episode I will run about a lot and scream at people, at some point I may have a bomb that needs to be got rid of. Suddenly I will deduce that Young Intern Girl is stuck / trapped somewhere and may have to run off and rescue her suddenly, even though MEMBERS OF PUBLIC are in danger.
Pursed Lip Woman
I have no need for Men, I am a spy machine, although Young Buck Man can tear my pants off with his teeth if he wants to. I will be high kicking an Arab in this episode, yet will work out he is in fact working for an Israeli, using my SUPERIOR INTELLIGENCE. I may purse my lips a lot.
Young Intern Girl
I am steely eyed and ambitious, yet always get caught and tied up. Luckily Young Buck Man seems to know where I am. I may have sex with him, but this mustn't affect MY CAREER!
Other guy
I run about a lot behind Young Buck Man and Pursed Lip Woman I always seem to have a secret (gay, addicted to snuff or something to do with Eastern Europe) Normally I am a black man.
I can do the plot lines as well, but that is kind of the icing on the cake.