Euripides's Hippolytos tells of an honourable youth's tragic death, contrived by his father in the false belief that his son had seduced his new wife. This edition of the play is intended for students and scholars alike. The text is based upon new collations of the medieval manuscripts (two ofthem hitherto uncollated) and on all known papyri. The introduction contains a significant reappraisal, in light of the evidences of papyri, of the history of the text in antiquity, and advances a new account of the relationship between the medieval manuscripts. There is also a full discussion ofthe earlier history of the legend and of two of the lost tragedies on the same theme.