Jodi Lyn O'Keefe Recalls Wild Times on Castle, Prison Break, Vampire Diaries and 5 Other Series 

With more power and purpose than ever before,

Jodi Lyn O’Keefe‘s Lionel Davenport is in rare form when

returns for its third season Monday (VH1, 9/8c).

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“She’s got a new focus this year,” O’Keefe tells TVLine of her character. “I think Pete is still one of her big goals, but she’s completely ensconced herself into this whole world. She’s no longer flitting in at times. She’s the boss. She’s the one in charge, so look out.”

Of course, “boss” could be used to describe a handful of the characters O’Keefe has portrayed over the years. From a gun-toting baddie on Fox’s

, O’Keefe is always a force to be reckoned with. (And no, we’re still not over her death[s] on

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TVLine invited O’Keefe to stroll down memory lane, recalling eight of her most memorable roles to date — including the one where she had to be told, “Stop smiling while you’re killing people. It’s creepy.”

Browse our gallery of O’Keefe’s roles below — or click here for direct access — then drop a comment: Which of her characters have been your personal favorites?

I’ll always remembered Nash Bridges (CBS).

I’ll always remember her as that bitchy girl from She’s All That and Whatever It Takes. She’s played that role to perfection. It almost freaks me out seeing her play nice roles.

She seems disarmingly enthusiastic and grateful for all of her roles, even the small ones. I like that.

I LOVE these “Memories From The Ser” articles., PLEASE keep them coming 😊

It’s always fun to see her pop up on a TV show. That said, someone needs to teach her how to hold a gun.

I’ve always been a fan since Prison Break! I hope there’s a way to bring back her character.

Me too! She played that part perfectly. One minute you would hate Gretchen than feel bad for her than hate her again. They should bring her back and since it was her favorite role, I’m sure she’d be more than happy to return.

Hopefully they won’t bring her back just to kill off Gretchen. I’d like her to stay alive.

I always think of her film roles first, but I loved her on TVD. I’m still bummed she didn’t end up with Alaric (Matt Davis) and had to die TWICE.

I love O’Keefe – she’s such a compelling actress. Don’t know why she isn’t like everywhere.

She’s a hottie,not sure why she’s so scared of being in a bikini :D

Well….I’ll say I’m proud that she has managed to grow a lot as an actress, because her time as Maggie Cory was painful to watch at times. It was of course very early in her career, though, and the writing in that period did no one any favors.

I never made the connection that TVD’s Jo was also Ellie on Castle. Mind blown.

I remember her as Cassidy from Nash Bridges. I liked her character’s name enough that my husband and I chose it for our first daughter.

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