The mid-season finale of "Breaking Bad" airs tonight, and Walt has some loose ends to tie up.

In a sneak peek at tonight's episode (above), Walt (Bryan Cranston) shows up at a restaurant in his full-on Heisenberg getup to meet with Lydia (Laura Fraser) to discuss a list of men who know too much about Walt's business.

"Let's take a look at the list," Walt says. "What, I'm not tying up loose ends for our mutual benefit?" he says, when Lydia seems wary.

"You're tying up loose ends, and I don't want to be one of them," she replies. "Once I give you that list, maybe I've served my purpose and I'm just one more person who knows too much."

While Lydia is now an integral part of "Breaking Bad," the actress wasn't exactly an expert on the AMC series when she nabbed the role.

"I was a little bit too nervous to watch ["Breaking Bad"] before," she said in an interview with Vulture. "I was wanting to stay in the world that I was reading from in the script. But after that first episode I went and watched the whole thing, because at that point I was like okay, I’m a part of it. I couldn’t resist any longer."

The mid-season "Breaking Bad" finale airs Sun., Sept. 2 at 10 p.m. ET on AMC.

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  • Dean Norris as Hank Schrader

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Aaron Paul as Jesse Pinkman

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Jonathan Banks as Mike Ehrmantraut

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Bob Odenkirk as Saul Goodman

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Betsy Brandt as Marie Schrader

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • RJ Mitte as Walter White Jr.

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Anna Gunn as Skyler White

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

  • Bryan Cranston as Walter White

    "Breaking Bad" Season 5 Exclusive Gallery Photo.

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