"Sally" was written by series co-creators James Bobin, Jemaine Clement, and Bret McKenzie, the latter two starring as the titular Flight of the Conchords.
Bobin directed the episode.
The episode is the first of the series to feature Rachel Blanchard as Sally.
The character returns to disrupt Bret and Jemaine's lives in the fifth episode, "Sally Returns".
In "Sally", the character Mel shows Bret that she carries around a picture of Jemaine's lips in her wallet.
This was inspired by an incident that happened to the band during the filming of their documentary A Texan Odyssey which covered their trip to the 2006 South by Southwest (SXSW) festival in Austin, Texas.
The incident was caught on camera and is included in the documentary.
Judah Friedlander has a cameo appearance in this episode, playing the role of the man who tries to sell Dave a cake.

The episode contains several cultural references.
Murray is wearing a New Zealand All Blacks rugby shirt when the band is in Dave's pawn shop obtaining a camera.
In the same scene, Murray and Bret have a conversation about the band Fleetwood Mac and their album "Rumours".
Rhys Darby, who played Murray, later asked Mick Fleetwood, the drummer for the band, if he heard the joke and whether or not he enjoyed it.
Fleetwood admitted that he "appreciate[d]" the joke.
During the filming of the video for "Robots", Jemaine tells Murray that he wanted robot costumes "like Daft Punk" rather than the amateur versions hand-crafted by Murray.
Murray replies with a characteristic lack of musical knowledge: "I don't know who he is."
"Sally" was written by series co-creators James Bobin, Jemaine Clement, and Bret McKenzie, the latter two starring as the titular Flight of the Conchords. Bobin directed the episode. The episode is the first of the series to feature Rachel Blanchard as Sally. The character returns to disrupt Bret and Jemaine's lives in the fifth episode, "Sally Returns". In "Sally", the character Mel shows Bret that she carries around a picture of Jemaine's lips in her wallet. This was inspired by an incident that happened to the band during the filming of their documentary A Texan Odyssey which covered their trip to the 2006 South by Southwest (SXSW) festival in Austin, Texas. The incident was caught on camera and is included in the documentary. Judah Friedlander has a cameo appearance in this episode, playing the role of the man who tries to sell Dave a cake.
The episode contains several cultural references. Murray is wearing a New Zealand All Blacks rugby shirt when the band is in Dave's pawn shop obtaining a camera. In the same scene, Murray and Bret have a conversation about the band Fleetwood Mac and their album "Rumours". Rhys Darby, who played Murray, later asked Mick Fleetwood, the drummer for the band, if he heard the joke and whether or not he enjoyed it. Fleetwood admitted that he "appreciate[d]" the joke. During the filming of the video for "Robots", Jemaine tells Murray that he wanted robot costumes "like Daft Punk" rather than the amateur versions hand-crafted by Murray. Murray replies with a characteristic lack of musical knowledge: "I don't know who he is."
Sally (Flight of the Conchords)