2019
S02E13 finale
A former CIA operative (Cumming), who has since built a "normal" life as a gifted professor and writer, is pulled back into his old life when the NYPD needs his help to stop a serial killer on the loose.
A Sweet 16 celebration turns into a crime scene when the birthday girl's stepmother falls to her death and the guests and staff are put under a microscope by the NYPD. Also, Ryan finds a new lead in his investigation, and Lizzie receives some positive news at the precinct.