Cragen couldn't have seen this coming if he'd tried. The masks are foolproof, until touched—they don't quite feel like real skin, the glue can't hold up to direct manipulation, all the little faults that add up. So foolproof, in fact, that this mask is able to fool a childhood friend of both himself and the real Tom. He's made it weeks interacting directly with Crabb without him refusing to let her touch his face being suspicious.

No one should be able to recognise that he's wearing a prosthetic. No. One

So when the hand goes so quickly for his face, he has only a split second to think wait, what? before the glue is tugging at his real skin, peeling away in one sharp motion, sending his glasses scattering to the floor and revealing a deeply scarred face that looks nothing like the man that Tom Broadfoot was and a lot like the man his biological father is.

Besides them, multiple things happen in quick succession: Crabb stands bolt upright with a 'hey!' on her lips as Smith reaches across. She attempts to shove him back with a hand on his shoulder. Her eyes flick towards Cragen. Her eyes go wide. And she stumbles as her distraction causes her to miss slip from the rung of her stool, barely catching herself as her breath leaves her.