Laura Mulvey and Peter Wollen’s visually accomplished and intellectually rigorous Riddles of the Sphinx is one of the most important avant-garde films to have emerged from Britain during the 1970s. The second collaboration between Mulvey and Wollen, both of whom are recognised as seminal figures in the field of film theory, Riddles of the Sphinx explores issues of female representation, the place of motherhood within society and the relationship between mother and daughter. The film’s ground-breaking electronic score, by The Soft Machine’s Mike Ratledge, was composed on synthesisers which were developed in collaboration with Denys Irving (the man behind the mysterious and controversial 1970s band Lucifer). Newly mastered to High Definition, this extraordinary, era-defining work is presented here with a wealth of essential bonus material, including a newly-recorded feature-length commentary by Laura Mulvey, Mulvey and Wollen’s film Penthesilea: Queen of the Amazons (1974), and a video interview with Laura Mulvey in conversation with the University of Breman’s Winfried Pauleit.