Say perchance that:

The moon was in LEO; at an open cubicle in a noisy room, Marcus gets off the phone with his wife and goes back to working on the computer program he was assigned.

you're a family man, unlike most family men.  the secrets you keep from you wife, frustrate you if you let them.  it's best not to think about.  you're a proud one, Marcus Dixon.  everything you do has some meaning to you or someone else. you serve your wife, you love your wife, you serve your country, you love your country; two separate entities.  what it is you do for your country is something that most people only watch on television. 

you have fond memories of your life before SD-6, before the CIA, the Marcus Dixon that was so fond of computers.  the task in front of you would have been a breeze back when you were twenty-two.  computer programming is so boring.  you hate the days that Sydney isn't here, those days you aren't rushing off to save someone from something.  missions have become your passion.  you see agents walking, talking, gathering research.  you sit at your desk.  twiddling with a couple of computer keys and a flashing curser; you feel like Marshall. 

opening a box of animal crackers, you softly laugh out loud at their ridiculousness.  you're thirsty.  the machine is down the corridor, but you'll hold off.  there's likely a crowd of people.  although you enjoy the company of others, bask in the adoration and respect they give to you, you decide to wait.  however, after taking an elephant, a rhinoceros, and finally a giraffe, it's time for a soda.  here we go.  you get up from your desk, wiping the animal crumbs from your tie.  12:06 pm.  on your way, you glare in on Marshall sitting on the floor of his little workshop.  you're compelled to knock on the glass.  he looks up, you wave, he looks down, you walk away. 

surprisingly, there isn't a single person.  you reach into your pocket, no change; take a dollar from your wallet, put it in the acceptor, and press the Sprite key.  spoke too soon.  five people walk in, all laughing and saying their hellos to you.  grab your change, your Sprite, and leave, smiling to the happy workers as you pass.

you make it back to your desk, open the can.  have another animal cracker.  this time it's a seal, your wife's favorite.  you look over to the small picture on your desk.  the one the two of you had done four months ago to send family members in Christmas cards.  you pick up the keyboard and think:  this is all worth it.