Detective Carter faces fallout from her encounter with Reese and Finch; the machine comes up with not one, but four Social Security numbers.
Killers target the Boston homicide headquarters, trapping Jane, Maura and Frankie Jr. in a fight for their survival.
Hannah tries to process an untimely death but seems more concerned about its impact on her eBook deal. Jessa tracks down an old friend she thought was dead. Marnie is horrified to discover a video Charlie posted online.
Julia visits Sean and Christian in Los Angeles; a past great love of Matt's shows up just as he prepares to marry Ramona; Liz announces she's pregnant.
Christian agrees with Ava to operate on baby Raphael in exchange for her to stay out of Matt's life who has abandoned everyone to be with Ava.