Though it could be the second or third unaired episode in terms of original running order, really not sure.
I read ages ago on fireflyfans.net that in the original script, it was a Beatles album Mal and co had to retrieve but apparently it cost too much for the cover rights so alas it wasn't to be.
Anyhow the Cinefastique commentary from Whedon and Minear.
Who among us didn’t want to see more of Saffron? She was delightful. Between her and Mal’s butt, we knew that this was landmark television. It was another sort of heist episode and was fun with a lot of things to play. It really was probably the lightest episode we did. The scene between Mal and Inara at the beginning is just hilarious. Really an opportunity to play around with everybody more than anything else. Obviously we always like to hit a few issues and I was interested in Saffron’s psychosis and I liked breaking it down like that and seeing what was behind it. It doesn’t mean you catch her, it doesn’t mean you win, but her interplay with Mal speaks a lot about both of them. It just came out fun.
Ben Edlund again. The return of Saffron and another hilarious heist. That was tricky, because Ben got to sit down and write this character that Joss had created that was very beloved on the “Our Mrs. Reynolds” episode and I thought he did a great job. One of the fun things about this episode was Serenity coming up under this trash bin in this floating city. It’s kind of sad that the episode didn’t actually air on television, because that floating city over the ocean was just not something you see on TV every day.