Jaffra's crew finds one on JoMac's crew and closes in on the Dr.; Jocko develops new evidence in Queens while Simon confronts Scarlett at STIP Headquarters.

Jaffra and his team split up in Newmark to search for JoMac's ship while they make their way to the hotel where they suspect Dr. "D" is hiding. Louie receives another cryptic phone call while Tracy develops a new suspect at the power plant.

Barnes and Jaffra gather info on the eastern town of Newmark, where they suspect the doctor is. Kelly and Nelson meet with Louie's landlord while Simon and Jamison meet with the Southwestern Regional STIP Transfer Point manager. It's all happening in episode 172 "East Bound and Down".

Nelson and Kelly plan to go to Louie's apartment; Simon and Jamison plantol visit the Southwest STIP Transfer Station while Tracy would be above them at the power plant. Barnes has received an interference signal and investigates at the hospital with Jaffra.

The Houston and Queens teams compare notes about Hank's latest cryptic message, while Sam dines with Hank to gather intel on his mission. Barnes finally arrives in Cali to formulate a plan to capture Doctor "D".
A couple of Easter eggs to look for, some quite blatant. If you're a vet and served in the Big Red One like me, I dropped one in there for you too.

Sam goes on a solo mission to spy on Hank while Louie is tailed in Queens by Nelson and Kelly. Meanwhile, Lenora joins the ranks of the IDF.

Sam meets Hank to gain his trust and learn of his mission; while Nelson and Kelly arrive in Queens to trail Louie. Meanwhile Barnes is headed to Cali where Gabby has just been freed by Doctor "D".

Gabby is being held by Doctor D while Jaffra fights for her release, Hank and Sam make contact while Louie heads for New York City.

Bella shows up on the Mercury on Cali, while Jaffra and Gabby deliver meds to the hospital. Hank establishes a routine on dining while Kelly gets ready for her first field assignment.

Gabby and Jaffra begin their delivery run to the old Cali Hospital while Nate gets an unexpected visitor from the past. Hank drops more clues in a call to Louie. Kelly prepares for her first field assignment.