This week just might be easily summed up in one sentence. The Compass Killer is back, plus Mac (Gary Sinise) confronts Flack (Eddie Cahill). Do I have your attention now? Before starting with what happened, a few words of description might be in order.
A company party gets crashed by a fired employee who is none too happy. No word on what causes the dismissal, but Bob livens things up by shooting one man and preparing for bullet number two when he's stopped by a truly lifeless body crashing the affair. Oh, and this was all on a rented yacht. The case appears cut and dried since the 59th Street Bridge is directly overhead the festivities. Mac and team must now declare the supposed jumper dead (not hard, with the fall's impact) and get the corpse in for a proper autopsy from Sid (Robert Joy). There are, however, a few kinks.
Flack is assigned the case. Or rather, he would be except he never shows for work. No biggie, everyone gets sick sometime. This, unfortunately, is not the case. Flack does not call in sick or request a personal day. Another homicide detective must step in. Okay, this is NYPD. I assume most who work there have a pretty high level of competence. Besides, it's not as though Flack has been the only detective on site who is not part of the crime lab. So why would Mac and Stella (Melina Kanakaredes) be concerned? Simple. Their buddy has been acting strange since his girlfriend was killed in the line of duty ("Pay Up").
Mac makes the bad decision to keep Flack out of trouble with the guy who heads the homicide division. Had he left well enough alone, the consequences might have been strong enough to get Flack's attention. Reprimanded? Probably. It's possible he would be suspended, but I am pretty sure he's too good of a cop to be kicked off the force.
Sinise is well adept at coming on strong when the script calls for him to do so. I do believe, though, he takes Mac's bad temper over the line this week. yes, there is a serial killer on the loose. That shouldn't be the main reason Mac loses his temper. Any cop could get him the information he needs to solve the case. Worse is the not wanting to hear Flack out. Cahill is trying to tell him something important, and his eyes speak volumes. Technically speaking, what happened between him and his girlfriend's killer in the warehouse would be self defense. At the very least, cold blooded calculated murder does not fit. Mac tells people his deepest secrets, and yet won't listen when a good friend needs an ear? Some leader.
Oh yes, the Compass Killer (Skeet Ulrich Jericho) gets tied into the victim this time. Which makes number three, but this story is still not over. TCK, as mentioned above, has issues with grief which manifest themselves poorly. He's had to spend time in a mental hospital, but the suggestion is it only made things worse. With another episode Ulrich is contracted into, the explanation for why the three victims are chosen will probably happen then. I doubt it's revenge, though. There was a massacre at the office where TCK is city manager, and half the workers died at the business end of a gun, including Calliope. Who is TCK's wife. THAT guilty party killed himself.
Danny (Carmine Giovinaazzo) is walking! This is no surprise, since there has always been a chance of him doing so. He's already back on the streets, which is where he belongs. Speaking of, Mac's concern over Flack leads Stella to triangulate Flack's phone. In other words, pinpoint the location by hitting two other points to make a triangle. She finds he is not is his regular neighborhood. So? It manages not to occur to her he might be doing his job. Oh no, she has to think he is in trouble. He is, but it would have fixed itself had she (and everybody else) left well enough alone.
Some people just have to fall sometimes. Whether this is the end of Flack's troubles remains to be seen. More than likely, Flack will tell someone what truly happened in the warehouse. Exactly who could be anyone.