After a robbery gone wrong ends with a murder and kidnapping, the team races to rescue a mother and daughter whose abductors are not what they seem. Also, Crosby enters a new living arrangement.

After Crosby's old army buddy is attacked in an apparent drug deal gone wrong, the team's quest for answers uncovers a dangerous web of conspiracy. Also, Jess questions his relationship with Sarah after an unexpected encounter.

The team heads to D.C. to protect Ortiz's former informant after a hitman tries to kill her. Also, Sarah helps Jess' family prepares for Byron and Marie's last-minute wedding on Jess' farm.

A local FBI case involving two murdered women and a sea of powerful men turns into a manhunt for the dangerous leader of a far-reaching criminal enterprise.

The crossover starts on FBI S04E01 All That Glitters (I). It continues on FBI: International S01E01 Pilot (III).

After a deadly fire at an arcade, the team discovers the blaze was just the first step in an intricate plan to exact revenge on one of the victims. Also, Hana rejoins the team, finding new adjustments in all aspects of her life.