Dekalog was made to piss off people with obsessive-compulsive disorder

Seriously.
The ten episodes are supposed to be based each on one commandment, but some of them focus on multiple ones.
Milk appears in several episodes as a leitmotif, but not in all of them.
Every episode has a different cinematographer, except for #3 and #9, which were shot by the same guy.
In every episode there's supposed to be a mysterious God-like character observing other characters, but again, he doesn't appear in two of them.