Some actors are household names. Others are in your house a lot, but you might not know their name – yet! One name that you should learn is William Mark McCullough because this guy is everywhere.

This season alone, William has appeared in a slew of television shows. He was a villainous outlaw in the old west on NBC’s “Quantum Leap,” a prisoner suspected of murder in Spectrum’s “Panhandle,” and a threatening redneck on Netfilx’s “Cobra Kai.”

Most recently, he brought portrayed a Joe Exotic-type into your living room during the "No Pressure No Diamonds" episode of the FOX series “The Resident.”

If you’ve missed all of these, then don’t worry. In 2023, Williams will recur in the new AppleTV limited series “Manhunt,” and he returns to the Netflix romantic drama show “Sweet Magnolias.”

Not a TV watcher, well then you might recognize William from the big screen as a drug smuggler opposite Tom Cruise in American Made. He also appeared with Nicolas Cage in Arsenal, Channing Tatum in Logan Lucky, Mahershala Ali in Free State of Jones, and Justin Chatwin in The Walk.

William has also taken a turn behind the camera. He wrote and directed a new supernatural drama feature film that is based on the haunted house he lived in with his family.

To learn more, William Mark McCullough answered a few questions about his latest TV appearance and more:

Tell us about your latest role in “The Resident.”

WMM: I play Wolf Benedict, the owner of an illegal zoo. He has a lot of similarities to Joe Exotic from “Tiger King.” Wolf is injured at the zoo but refuses to tell the doctors at Chastain Memorial Hospital what happened.

What would you consider your characters ‘best’ quality? And their ‘worst’?

WMM: Wolf’s best quality is he loves animals. His worst quality is he obviously doesn’t mind breaking the law.

You’ve guest starred on a lot of TV shows this season. What’s it like walking onto all these different sets?

WMM: It is always exciting walking onto a new set with a whole new cast, crew and work style. I enjoy working with actors who have different styles and approaches to the craft. It’s fun to jump into the scene with them and just play. Directors also bring their own unique approach to projects. The relationship between an actor and director is special. When I get on a new set, I quickly get a feel for how the director likes to work and I do my best to make their job easy.

Any memorable moments from the set you can share with us?

WMM: I spent most of my time on set in a hospital bed, which was very unusual for me. I normally play physically active characters, so having to do all my scenes while lying down was a fun change of pace. Getting to work with Matt Czuchry was such a delight. He is one of the kindest and most down to earth actors I’ve ever worked with. A true class act.

Is there anything specific you do to prepare for role? And does that change depending on the genre or type of project you’re working on?

WMM: I often change my facial hair and physique for different roles. I recently played a violent prison inmate, so I gained a lot of muscle to be more convincing in the role. I then did a TV series based during the Civil War, so I had to lose a lot of that muscle to look realistic in the time period of the show. The hardest prep I do is when I have to master an accent for a role. I played a Nazi SS officer in a film, which required me to spend a great deal of time and effort perfecting the accent before we started production.

You’ve also ventured into filmmaking, releasing your directorial debut recently. Tell us about that experience.

WMM: Directing and producing a feature film is the hardest thing I’ve ever done. It made law school feel like a Sunday in the park. We were one of the first ten films in the country to shoot during the Covid pandemic, so the Covid protocols were still extremely intense and everything was still being figured out. Even though the logistics were tough, I loved working with the cast and crew. Because of my background in acting, I have a shared language with other actors that allows me to communicate with them in a way that is easy for them to understand. I’m very proud of what we were able to accomplish under very tough circumstances.

The film is called “A Savannah Haunting” and it’s based on real experiences my family and I endured in our home in Savannah, Georgia. We shot the film in my house where the real haunting occurred. It is currently available on all major digital platforms.

What’s the biggest lesson you’ve learned from directing that has influenced you now as an actor?

WMM: Be easy to work with! In many ways an actor has the easiest job on a set. The director, producers and crew usually work many more hours during filming and the director and producers may have worked months or years on the project before filming starts and will work on it for months or years after filming ends. I look at my job as an actor in two parts: 1) Deliver an honest, powerful portrayal of the character in alignment with the script and the director’s vision, and 2) Do everything to make everyone else’s job easier. I try to never be the reason that things are difficult or slow on set.

And, now just for fun:

Who’s your favorite actor/actress?

WMM: Philip Seymour Hoffman

What role from the past do you wish you could have played?

WMM: Lt. Frank Bullitt in “Bullitt”

Favorite movie or TV show from your childhood.

WMM: Favorite movie – “Die Hard”

Tell us one thing that would surprise our readers to learn about you.

WMM: I was a prosecutor before I moved into acting.

How can fans keep up with you?

WMM: You can find me on Instagram at @wmarkmccullough link