Production Sketch:

Go to the Extras Menu and select Clean Closing Animation. Press, left, down, left, down, and then press your Enter button to unlock the production sketch.

Interview:

Go to Episode 3, Chapter 4, then push left, left, right to unlock the interviews.

Still Image:

Select any episode on the "Main Menu". While the silhouette is being killed, push up, down, up, down, a naked Mireille will grace your screen.

All easter eggs were generously submitted by SirDonk