Can you recommend a film with a philosophical theme?!

Can you recommend a film with a philosophical theme?

I am looking for films that help to understand philosophical concepts and address moral issues.

I'd say "What the Bleep do we know", "The Waking Life" and "The Matrix" for their takes on existence & physical reality. For issues of identity and moral behavior, I'd say "AI: Artificial Intelligence","Emperor's Club", and "A Clockwork Orange"

I also liked "Memento" and "Being John Malkovich".

Other films which are frequently recommended for their philosophical themes are "Leaving Las Vegas" and "Pi" (The actual mathematical symbol is the title) but haven't seen either of them yet, so I can't comment.

Here's a more exhaustive list of such films, with short synopses: