Spoiler alert: The following article contains spoilers from The Rookie season 7, episode 4, "Darkness Falling."

It has been years since The Rookie produced a memorable, well-developed main villain, but season 7 might have finally introduced one in episode 4, "Darkness Falling." The ABC police procedural series has featured many antagonists with multi-episode arcs since season 2, from Rosalind Dyer to Monica Stevens. However, some worked better than others. The Rookie has been struggling to find its next Rosalind as of late. After the arrival of one new character, though, the TV show should take advantage of their potential and make them season 7's Big Bad.

Following new episodes of Will Trent season 3 and High Potential season 1, The Rookie season 7 airs on Tuesdays at 10 pm ET on ABC.

The "case of the week" in The Rookie season 7, episode 4 revolves around a serial killer targeting young women. The characters quickly learn his identity — Harrison Novak, played by Noel Fisher, who some may recognize as Mickey Milkovich from Shameless. Harrison was arrested three years prior for burglary and assault. However, due to a lack of sufficient evidence, he was released from custody, and Wesley was the defense attorney who got him acquitted. The Rookie characters ultimately capture Harrison, who then shows the police where he buried all his victims, à la Rosalind Dyer.

The Rookie's Harrison Has The Potential To Be The Next Big Bad Of The Show

Noel Fisher Stars As Harrison In Season 7, Episode 4

Even though Harrison gets arrested in The Rookie season 7, episode 4, he could still be the show's next great villain. Rosalind Dyer was in custody for most of her run, after all. Harrison is a psychopath, a serial killer, snarky, self-important, and has all the other makings of a notorious antagonist. Plus, Noel Fisher is a talented actor who does a fantastic job of playing Harrison. He leaves a significant impression on viewers despite not having a lot of screen time, which gives The Rookie more than enough reason to want Fisher as Harrison back.

The Rookie also sets up a rival for Harrison that could make his status as season 7's Big Bad quite intriguing. When digging up his victims, the LAPD finds other bodies, and Harrison claims he didn't murder those. The characters in The Rookie season 7 are inclined to believe him because he wants credit for his kills and doesn't like sharing the spotlight. Someone knew where Harrison's dump site was and used it to dispose of their victims. Angela and Nyla got close to capturing this mysterious person, but they got away. All this means is that Harrison must continue his arc.

Why The Rookie Needs A Multi-Episode Villain In Season 7

The Show Hasn't Had A Great Big Bad Since Rosalind Dyer

Three of The Rookie's best villains (Rosalind Dyer, Nick Armstrong, and La Fiera) had multi-episode arcs that were well-executed, entertaining, and highly memorable. Unfortunately, the series hasn't produced another Big Bad that lives up to Rosalind, Nick, and La Fiera's legacy yet. Monica Stevens' story is too clunky despite its potential, and Jason Wyler's threat level isn't as high as it should be. The fact remains that villains with multi-episode arcs are a part of The Rookie's foundation, and season 7 can establish a great one with Noel Fisher's Harrison.