- "You protect me. I protect you."
Nathaniel "Nate" Lahey, Jr. is one of the main characters of How to Get Away with Murder. He is a tough, respected Philadelphia detective who works tirelessly to uphold the law. There's only one person that can get in the way of that... Annalise Keating. Assertive and sharp, Nate doesn't allow people to play games with him. As a result, Nate is one of the only people Annalise can really be herself around. But that doesn't mean they're entirely honest with each other.
Nate is forced to lie to the court. ("Pilot")
After coming up with an idea that could be useful in Gina Sadowski's trial, Wes Gibbins hurries over to Professor Annalise Keating's office, where he finds her getting ready to have sex with Nate Lahey. The detective tells Wes to get out. Annalise leaves the room to meet Wes in the hall; Wes presents his idea, but is told that it's not good enough. A couple days later, Nate is called to the court as a witness. Annalise asks where he was the night Detective Gill supposedly acquired the video that incriminates Gina. Nate states that he was "at a friend's." Annalise finds it odd that it took so long for evidence to get logged into the computer, but Nate tells her that sometimes that's what happens. Annalise asks if Nate has ever known them to alter video footage to help the prosecution get a conviction. He states that he has, thus winning Gina's case.
After Annalise managed to get her class action lawsuit reinstated and sent to the Supreme Court, Nate visits the prison where he informs his dad and that there may still be a chance that he might just get out of there. Nate's father becomes emotional when he tells him the good news. The following day, Nate makes the trip to Washington DC where he visits Annalise at her hotel room where he is greeted by Olivia Pope and Annalise's parents, Ophelia and Mac Harkness. Olivia worries the court will use the fact that their face case is Annalise’s ex-boyfriend's father to crucify her and use it to dismiss the lawsuit. Later, while getting ready for the Supreme Court, Nate is prepping his dad on the stress of the courtroom and helping him shave to better his appearance. They then wait in the courtroom for Annalise to arrive. After she does, she presents the justices her case that her plaintiffs of the case are all examples of victims of being given poor representation from their public defenders. Although, Justice Strickland, especially gives Annalise a hard time and the opposing attorney, Ingrid Egan argues that the money which Annalise is proposing be given to the public defenders could be going to other, more important places such as schools. Following court, Annalise answeres a few questions and thanks Nate's father for his involvement in the case. ("Lahey v. Commonwealth of Pennsylvania")
Following Simon Drake waking up from his coma, Bonnie has Nate go to the hospital to see what information he can gather about Simon's conditions. Later, Nate calls Annalise to inform her that Simon remembers that Laurel was at the party that night and is prepared to give a statement to the detectives. Annalise then uses this information to inform Laurel to hide from the police so that she can deal with it. In the end, Annalise manages to convince Simon to stay quiet about Laurel in exchange for their assistance with getting him a whistleblower visa. Later that night, there's an accident; someone from the District Attorney's Office is dead. He calls Annalise to inform her that someone is dead and they think that it could be Bonnie. Nate then meets Annalise at the parking garage where they discuss who the victim could be. Bonnie comes up from behind them to tell them that it was D.A. Todd Denver who died. ("The Day Before He Died", "Nobody Else Is Dying")
Nate reading the files Denver had on Annalise's associates. ("Nobody Else Is Dying")
After District Attorney Todd Denver's death, he digs into some of Denver's old cases in the database. He finds a suspicious looking case which was signed as open and Nate investigates it. Once he gets to the evidence lockers, he tells the police that they’re looking into old cases to find people with grudges against Denver and goes to an old evidence locker. There is something in the locker, despite the case being supposedly closed for decades. Files on every one of Annalise's associates along with Dominick's phone and the hard drive. Once he returns to the Easton Hotel, he falsely informs Annalise that Denver didn't have anything on them and that he was just bluffing. He hands over the hard drive so that Oliver could hack into it and find illegal evidence against Antares Technologies. Later, after the news was out that Jorge Castillo had been arrested on multiple crimes and that the justices had ruled in Annalise's favor for her class action lawsuit, he called her and was surprised that her phone wasn't "blowing up" with phone calls. Later in his office, he removes the files which he obtained from Denver's locker on Annalise's associates and reads Bonnie's. One of the pages which he stops on is the one with a DNA test which suggests that her child may be alive. ("Nobody Else Is Dying")
- Nia Lahey: Due to his wife's illness, Nia had been wanting to end her life for some time, initially asking Annalise Keating for help before she refused. Nate stepped in and acquired the drugs which she took, killing her. Due to how ill she was, the death wasn't classed as suspicious and was ruled a natural death due to natural circumstances. ("Two Birds, One Millstone")
- On the ABC website Nate is described as "a tough, respected Philadelphia detective who works tirelessly to uphold the law. There's only one person that can get in the way of that... Annalise Keating. Assertive and sharp, Nate doesn't allow people to play games with him. As a result, Nate is one of the only people Annalise can really be herself around. But that doesn't mean they're entirely honest with each other..."
- Nate is left-handed. ("He's a Bad Father")
- Main article: Nate Lahey/Gallery