On Tonight

A seemingly-unstoppable Billy Miles begins killing scientists performing genetic research—then targets Scully.

Mulder searches for answers when a connection is made between Billy Miles and members of the FBI; Scully and Reyes find refuge in a remote location as Scully prepares to give birth.

When a mother of three is found dead a mile from her home, the investigation leads to an unlikely suspect.

Police suspect a woman's estranged husband in her stabbing death, but surveillance video shows he was not at the scene.

Logan and Wheeler must determine whether the kidnapping of a popular video blogger and her boyfriend, seen online, was real or staged.

When a respected judge is killed during the re-creation of a famous duel, Goren and Eames question his dueling partner (Xander Berkeley), a prominent political candidate's husband.

ANW continues the competition in Indianapolis.

ANW returns to Oklahoma City, Oklahoma where the top 30 competitors from the City Qualifier tackle an even more challenging course that includes ten obstacles in the City Finals.

When a well-known doctor is killed, Detectives Benson and Stabler question the doctor's estranged and troubled son.

An unidentified man is found shot and sexually assaulted in an alley outside of a gay bar.