Reign of Love () also known by the name of the Arabic version of the series The Stranger of Tus ( is an Iranian epic historical drama TV series directed by Mehdi Fakhimzadeh, which aired on IRIB TV1 in 2000. The series is about the life of Ali ibn Musa al-Reza, the eighth Imam of Shia Islam. It mainly focuses on the period of his life when he was brought from Medina to Merv by order of al-Ma'mun, particularly his tenure as heir apparent, until his martyrdom. A telefilm version of the series was also produced and released.
The story begins with the death of Harun al-Rashid, the Abbasid caliph, and the coming to power of his son al-Amin. In the continuation of the war between Amin and his brother Mamun, the caliphate of Mamun and the bringing of Ali ibn Musa al-Reza to Merv are shown. It also describes the important events of this period, such as his entrance to Nishapur, the narration of the Hadith of Golden Chain, the rain prayer, the Eid al-Fitr prayer, and the debates between religions.
Music was by Babak Bayat and singing Mohammad Esfahani.