With its jagged, stylised sets, menacing shadows and themes of murder, madness and delirium, Das Cabinet des Dr. Caligari (1920) remains the source and essence of German Expressionist cinema. Fusing carnival spectacle with the paranoia of the psychological thriller, it centres on the haunting, sexually ambivalent presence of Conrad Veidt as Cesare - the somnambulist exploited as
an instrument by the sinister Dr. Caligari.