You can watch this episode on Paramount+ or read a detailed recap on the Criminal Minds Wiki . S1:E15 – Unfinished Business - unsubmary - WordPress.com
In the Criminal Minds episode " Unfinished Business ," the BAU chases the Keystone Killer, who resurfaces after 20 years with a modified, less physical method of killing. The team, assisted by retired profiler Max Ryan, realizes the killer’s change in MO is due to physical limitations from a past accident. The episode concludes with the team rescuing the next victim and allowing Ryan to close the case. [S1E15] Unfinished Business