Better Call Saul, Season 4

Gale:
Oh, I tested your samples. They range from 39% to 58% pure. Except this one, which hovers around 67. Top of the glass, so to speak. You should tell the chemist to check his or her cookware. It's introducing contamination, which would be easy to avoid.

Gus:
Well, thank you very much, Gale. That's very useful information. Well, I should let you get back to your work.

Gale:
Mr. Fring, um... I—I don't want to cast aspersions, but I have to tell you, these samples aren't great. I-In fact, they're, um... They're—they're not even good. Basically, they're dreck. I could do much better...

Gus:
Gale–

Gale:
...much higher-grade. I could make a kilo or more right here, no one would know. It wouldn't take more than a few days.

Gus:
I wouldn't want to interfere with your studies.

Gale:
These are my studies. Please, it's the least I can do. I wouldn't let you down.

Gus:
[chuckles] Oh, I'm certain that you wouldn't. But I'm afraid I can't allow it. Not yet. You were meant for better things. I'll see you soon, Gale.