The boys' trip to Chicago concludes in a weird episode about an unsub killing at the behest of an Internet radio show. Hey, we don't write this shit. Potentially more interesting is a subplot in which Rossi meets with his third ex-wife because she wants him to attend his daughter's wedding. The thing is, the husband to be might be an unsub in the making. Can Rossi stop the wedding in time? Seriously, we're doing this.