Sonya and Marco search for a missing girl. Charlotte meets someone who knows too much about her new business venture. Marco makes a decision that could change everything.

Sonya uses Linder's latest problem to repair her relationship with Marco. Charlotte forms an unlikely alliance.

Showdown on the bridge as the Killer reveals his endgame.

Sonya and Marco close in on the Killer. Charlotte takes drastic measures to protect her ranch. Frye learns that demons from his past aren't done with him yet.

Marco reconnects with a friend from his past and races to save his family. Charlotte responds to her biggest threat. Linder reveals his true feelings.

Sonya pursues a cold lead despite Marco's insistence that it's a dead end. Charlotte finds out that Ray has jeopardized her ranch.

The EPPD corners their prime suspect. Charlotte questions Ray's true intentions. Linder crosses the border and takes on his most difficult case yet.

Sonya bonds with a key witness from the case. Marco uncovers Sonya and Hank's past. Charlotte calls on an old friend for help.

Sonya and Marco suspect a cover-up. Charlotte goes to Marco for advice. A troubled girl seeks adventure in Juarez. A visitor stops by Linder's apartment.

The clock ticks as Maria's broadcast continues. Sonya searches for the girl's location. Against protocol, Marco works a unique ransom angle. A powerful Juarez force crosses the border.

Sonya and Marco race to track down a prime suspect who could lead them to the lone desert survivor. Charlotte confronts an unexpected visitor determined to keep business as usual.

Marco and Sonya investigate the body from the bridge. Frye learns that the Killer isn't done with him. Charlotte makes an unwelcome discovery on her property.

When a body is found on the bridge connecting El Paso and Juarez, two detectives, one from the United States and one from Mexico, must work together to hunt down a serial killer operating on both sides of the border.