A great movie - not to be missed. If it helps -
The 2012 50th anniversary DVD from Studio Canal has the 'Before the Law' prologue, but doesn't have the extras that are on the Blu-Ray. Excellent picture quality, 1.66 - 1.
The 2007 Studio Canal DVD doesn't have the 'Before the Law' prologue, but does have some of the extras. Excellent picture quality, 1.66 - 1.
The Elstree Hill DVD from 2005 is dreadful fuzzy picture quality and is 4 x 3 pan and scan. It does have the prologue.
The version without the prologue was prepared for French TV by Orson Welles himself in the 1980s.
I first saw The Trial in the cinema with the prologue, so I was expecting to see the prologue and was initially disappointed when I saw the DVD without it. But when I saw the 2012 DVD I had second thoughts. After all there is no prologue in Kafka's novel - it starts with K waking up. Before the Law is a separate short story altogether ( from Wedding Preparations in the Country ).
Welles' voiceover reading Before the Law is a bit ponderous and preachy, and there are a couple of extra comments that make it seem as if you are in a lecture theatre. I think I may prefer the movie without the prologue after all.
However, the picture quality is stunning ! The photography and lighting will take your breath away ! It is a fantastic adaptation of the novel, and Anthony Perkins is fantastic.
Whether you want the prologue or not - just sit back and enjoy.