ABOUT THIS EPISODE

How do you profile a serial killer who keeps changing his pattern?

A body encased in ice and a cryptic message make Malcolm, Seong-Jae, and Aanga Joshi question everything they thought they'd learned about the Golden Ratio Killer. If their suspect can change his methods and alter his patterns, he could easily disappear...

...along with any chance of catching him before he completes his deadly game.

To keep up, Malcolm and Seong-Jae will have to find the bigger picture, the larger plan to intercept their target before that strange message turns into another victim — but it's the small things tripping them up when their relationship and some unsettled business between them leaves them stumbling around each other and falling head-first into mistakes that could cost them more than just the case.

It could cost another innocent life, and leave that blood stained on their hands.