Mrinal has written scripts for TV serials like "Kaahin Kissii Roz", "Kya Haadsa Kya Haqeeqat", "Tum Bin Jaaoon Kahaan", "Banoo Main Teri Dulhan", "Amber Dhara", "Chhoona Hai Aasmaan", "Kyunki Saas Bhi Kabhi Bahu Thi", "Santaan", "Kasturi", "Maayka", "Qubool Hai", "Kaali- Ek Agnipariksha", "Sanjog Se Bani Sangini", "Nazar" and "Pyaar Ka Bandhan".