This volume is designed as a companion volume to the new text of Sophocles (published in the Oxford Classical Texts series). It aims to explain the editors' views about a large number of disputed passages that occur in the plays. Many of the discussions are too long and complex to be incorporated in the apparatus criticus of the Oxford Classical Texts, and are here expounded in full. The introduction, which gives a historical survey of Sophoclean scholarship, is followed by discussion and comment arranged play by play according to line number. In an appendix the editors offer a partial solution to the puzzle of the unknown manuscripts allegedly used by the sixteenth-century Flemish scholar Livineius.