Scott Kimball
Screenwriter
- Joined
- May 8, 2000
- Messages
- 1,500
I assume you mean the R1, season 6 set - not any of the R2 incarnations?
The R1 Once More, With Feeling includes a Joss Whedon commentary, a "making of" which is around 25 - 30 minutes, and a karaoke feature (which I ignored, so I can't give specifics).
In addition, the musical is referenced a few times in the "Season 6 Overview" on disc 6.
-Scott