The Trials of Oz is 1991 video-taped BBC television drama shown in the UK on 9 November 1991 as part of BBC 2's Performance anthology series of single plays.It concerns the six-week trial in June and July 1971 trial in which the editors of the British underground magazine Oz were prosecuted on three charges, including obscenity. The play is an adaptation of the transcripts of the court case by Geoffrey Robertson, who was junior defence counsel at the trial.