Behnam Diani (بهنام دیانی) has been a Writer in some movies:

Private Party is about that In autumn of 1954, due to a new post assigned to a diplomat in Moscow, a private party is being held in his house in Tehran. The guests are all his close friends and ...consist of some important governmental individuals. During the party, some escapees enter the house and make a disturbance. The officers also are seeking the houses in the neighborhood in search of the convicts. Through the encounters between the invaders and the guests, some events come up which show the real personalities of all the people involved. In this film Behnam Diani (بهنام دیانی) collaborates with Turan Mehrzad (توران مهرزاد), Kioomars Malek Motiee (کیومرث ملک مطیعی), Manouchehr Hamedi (منوچهر حامدی), Parviz Pour Hosseini (پرویز پورحسینی), Hadi Eslami (هادی اسلامی), Mohammad Bozorgnia (محمد بزرگ نیا), Mostafa Kamyab (مصطفی کامیاب), Reza Ardalan (رضا اردلان), Ali Torabi (علی ترابی), Hassan Hedayat (حسن هدایت), Khosro Dastgir (خسرو دستگیر), Hassan Gholizadeh (حسن قلی‌زاده), Reza Mohajer (رضا مهاجر), Mohammad Barsouziyan (محمد برسوزیان), Mitra Ghamsari (میترا قمصری), Eltefat Ghorbani (التفات قربانی), Asghar Zamani (اصغر زمانی), Vahé Katchan (واحه کاتچان), Saeed Abbasi (سعید عباسی), Soheila Riahi (سهیلا ریاحی), Morteza Rastegar (مرتضی رستگار)

The Ship Angelica is about that Many years ago The Angelica which was carrying gold and silver from the Portuguese to the Arab Sheykhs had been sunk in the Persian gulf. Ahmad Beyk manages to find it's place and is after getting the treasure out. He goes to Shiraz's governor's son and demands his help agreeing with him on sharing the profits 50 percent for each. But the governor's son wants it all for himself unaware that the English forces there are became interested in the Angelica too. In this film Behnam Diani (بهنام دیانی) collaborates with Atila Pesyani (آتیلا پسیانی), Ezzatolah Entezami (عزت‌الله انتظامی), Katayoon Riahi (کتایون ریاحی), Mehdi Fathi (مهدی فتحی), Majid Mozaffari (مجید مظفری), Dariush Arjmand (داریوش ارجمند), Abbas Ganjavi (عباس گنجوی), Eshagh Khanzadi (اسحاق خانزادی), Hossein Maleki (حسین ملکی), Babak Bayat (بابک بیات), Jalal Moayerian (جلال معیریان), Parviz Pour Hosseini (پرویز پورحسینی), Mohammad Bozorgnia (محمد بزرگ نیا), Jamshid Jahanzadeh (جمشيد جهانزاده), Amir Esbati (امیر اثباتی), Hassan Gholizadeh (حسن قلی‌زاده), Sogand Rahmani (سوگند رحمانی), Ali Akbar Erfani (علی‌اکبر عرفانی), Fereydoun Aboo Zia (فریدون ابوالضیا)

Angel's Day is about that Dadash Beik who has waken up on the wrong side of the bed, is summoned to the Justice Department to pursue the case of one of the debtors of his company. During a conflict with the debtor, he is forced to climb the statue of justice. He falls from the top of the courthouse and enters a new world where fairies, goblins and ghosts are lurking in every corner. In order to return to the mortal world, he has to find the eternal home or the grave of one of his old friends with whom he has had no connections for forty years. In this film Behnam Diani (بهنام دیانی) collaborates with Akbar Abdi (اکبر عبدی‎), Esmail Davarfar (اسماعیل داورفر), Ezzatolah Entezami (عزت‌الله انتظامی), Hossein Moheb Ahari (حسین محب اهری), Mohammad Reza Honarmand (محمدرضا هنرمند‎), Behrooz Afkhami (بهروز افخمی), Seyyed Zia Hashemi (سید ضیا هاشمی), Ghogha Bayat (غوغا بیات), Mina Lakani (مینا لاکانی), Abdollah Eskandari (عبدالله اسکندری), Babak Bayat (بابک بیات), Parviz Pour Hosseini (پرویز پورحسینی), Azim Javanrooh (عظیم جوان روح), Farahnaz Manafi Zaher (فرحناز منافی ظاهر), Niloufar Mahmoudi (نیلوفر محمودی), Mohammadreza Mouyini (محمدرضا مویینی), Ali Dashti (علی دشتی), Ghaffar Rezaei (غفار رضایی), Farahnaz Mehr (فرحناز مهر), Mehdi Jourak (مهدی ژورک)