Twenty more minutes. All he needed was twenty more minutes.
Once the op was done, everything was in chaos. If he could have been a little faster, if Fi had been a little more patient, he could have gotten to her and they could have run.
He stands in traffic, the words of her note burned into his mind, and wants to cry or scream or shoot something or...
Twenty more minutes. He could have gotten to her. He's got a top secret level clearance, a CIA ID that's real and half a dozen other government IDs if that one wasn't optimal, and a pair of handcuffs. He could have been "taking her in," if anyone asked, gotten her on a plane, and they could have run.
They could have gotten away. Hidden her somewhere safe, and then gone for Anson's jugular.
Twenty more minutes. She's no longer in view, and he's standing in the middle of traffic, starting to attract attention.
He's dropped the note, and scrambles to find it. He can't lose her words.
Sam finds him in the Charger, and all he wants to do is fight. He wants to pound on Sam, break him, not just for letting Fi go, but also for trying to tell him that ridiculously lame lie.
Fi knocked Sam out? No way. Fi hit Sam so he'd have a plausible explanation for why he was handcuffed to the wall, sure. Michael believes that. He does not for one second believe that Fi got the drop on Sam and coldcocked him, or that Sam didn't know exactly what was going to happen when he got her purse.
But beating on Sam won't fix anything, and it won't make anything better, and Anson's in the wind, so they have to move.