Assassins From The Past:

It started out as a mission. But most things in SHIELD did. Just another recon, collecting a bad person, putting them in jail where they couldn't hurt anyone like he had. It was so simple, so easy. Well, it was meant to be. What really happened was a huge, tangled mess. But we as readers love huge, tangled messes. Especially if they concern one of our favourite characters. 2 shot.