Jaylen Barron

With the help of Special Agent Genny Shaw (guest star Tina Majorino), the Jeffersonian team identifies the remains of a discount shopper and “extreme couponer” who was dragged along the road by an 18-wheeler. Meanwhile, Brennan is adjusting to her first day back at work after giving birth, and Cam disapproves of her daughter’s romance with intern Finn Abernathy (guest star Luke Kleintank).

In the aftermath of the dam break, massive mudslides wreak havoc throughout Los Angeles; Athena fights to save herself and an agoraphobic woman after her house collapses; a group of pregnant women trapped in a submerged house.

Debbie shows up at the church with Franny, while Ian brings Caleb to meet the family. Frank reveals that Sean is a practicing junkie, but Sean is desperate to keep his son in his life.

Sean moves into the Gallagher house, and Fiona plans a traditional wedding. Meanwhile, Kev is unhappy about the green card marriage.

Frank offers to pay for Fiona's reception, but when Sean worries that Frank will only hurt Fiona, he confronts him.

Frank is concerned that he and his new family will lose their shelter while Fiona throws a speakeasy party at Patsy's Pies.