John Ruby

Raylan turns to an old friend for help after Ava makes a drastic decision.

A bomb kills five people at a protest rally, and Beckett and Castle try to solve the case by reconstructing the 47 seconds before the explosion.

Jules starts to question her relationship with Grayson; Travis' girlfriend throws Bobby off his golf game.

Dr Robbins ventures into Mexico to perform an autopsy on a friend's daughter; the team investigate two concrete-caked bodies found buried in a garage and uncover an unlikely connection between the two cases.

Alex offers to design a dress for Jane for a charity event; Penny helps Max babysit; Dave and Brad realise their new friendship with the mailman isn't all it's cracked up to be.

When a crime scene lab technician is murdered, Mac and Jo find that the crime resembles a cold case from the 1950s.