If you loved Diabolique, try The Testament of Dr. Mabuse
A bridge between a film you've already seen and one most people haven't. The Testament of Dr. Mabuse has roughly 3.8× fewer votes than Diabolique — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the cult, dread, foreign gem, slow burn mood tags, and they sit in Mystery / Thriller territory. If that's the register that drew you to Diabolique, the second film will land in a comparable space — through a different lens.
What The Testament of Dr. Mabuse is
A lunatic asylum east of Berlin, dawn frost on the windows. A patient scrawls invisible orders while keepers hum hymns. Detective Lohmann wakes in a padded cell, watched by a colleague who speaks in riddles. Professor Baum claims the criminal genius Mabuse has been dead for years yet his rambling treatise still steers new heists across the city. Lang’s Weimar shadow-play where ink bleeds into blood and silence howls.
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