According to dvd-inside.de it's going to be a 2xDVD affair and the extras are:

- Making of "Inside the Party"
- The Party Revolution: a new Technology
- Profiles of the filmmakers: Blake Edwards, Walter Mirisch, Ken Wales
- TV-spots
- 1971 interview with Peter Sellers
- Photo Galleries
- Original theatrical Trailer


(I hope you understand my english because my spanish is not that good, I'm afraid...)

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