The detectives are spread thin when three major cases come in at Midnight. Rollins and Carisi argue over an arrest.
Reagan family tensions run high when Frank and his grandson, Joe Hill (Will Hochman), contend with a grievous insult to the memory of Joe's father, Joe Reagan.
Needing space after a fight with Desi, Marnie goes for a walk and has an unexpected run-in with someone from her past.
