Siddig El Tahir El Fadil El Siddig Abderrahman Mohammed Ahmed Abdel Karim El Mahdi (Arabic: صدّيق الطاهر الفاضل الصدّيق عبدالرحمن محمد أحمد عبدالكريم المهدي‎ Ṣiddīq aṭ-Ṭāhir al-Fāḍil aṣ-Ṣiddīq ʿAbd ur-Raḥman Muḥammad ʾAḥmad ʿAbd ul-Karīm al-Mahdī; born 21 November 1965) is a British actor. He is known by the stage names Siddig El Fadil through the mid-1990s and Alexander Siddig since. He is known for playing Dr.