|First appearance||Pālābāra Patha Nē'i|
|Last appearance||Syānḍārsa Sāhēbēra Punthi|
|Created by||Suchitra Bhattacharya|
|Portrayed by||Rituparna Sengupta|
|Full name||Pragyaparamita Mukherjee|
Suchitra Bhattacharya created detective fictions about Mitin mainly for teenagers, although wrote some stories of Mitin for adults. The real name of Mitin Masi is Pragyaparamita Mukherjee. She is in her mid 30s, lives in Dhakuria, Kolkata with her husband, Partha and son, Bumbum, and likes to cook. Mitin works as a private detective, who likes to use her mind rather than her revolver. Oindrilla, popularly known as Tupur, is her niece. Tupur is a school student who assists her in many of her cases.
- Saranday Shoytan
- Jonathaner Barir Vut
- Keralay Kistimaat
- Sarpa Rahasya Sundarbone
- Jhao Jhiyen Hatya Rahasya
- Chhokta Sudoku'r
- Arakiyeler Hire
- Guptadhaner Gujab
- Hate Matro Tinte Din
- Kurie Paoa Pendrive
- Marquis Strete Mirtyufand
- Tikorparay Gharial
- Duswapno Barbar
- Sanders Saheber pnuthi.
Apart from these, Suchitra Bhattacharya also wrote five adult detective stories of Mitin Masi namely Bish, Trishna Mara Geche and Maron Batas, Megher Pore Megh and "Palabar Path Nei " , an independent novel introducing the character of Mitin of Third Eye Agency.
Arindam Sil, director of the Byomkesh Bakshi series, has completed the first Mitin Mashi film based on the story Hate Matro Tintey Din. Mitin is going to be played by Bengali actress Koel Mallick. The film Mitin Mashi is slated to be released during 2019 Durga Puja.
- Suchitra Bhattacharya (2008). Tin Mitin (Bengali). Kolkata: Dey's Publishing. ISBN 978-81-295-0760-0.
- "Detective Mitin Mashi, not middle-class tales, might be Suchitra Bhattacharya's lasting legacy". 16 May 2015. Retrieved 30 July 2017.
- Suchitra Bhattacharya (2014). Mitin Masi Samagra (in Bengali). I. Kolkata: Ananda Publishers. ISBN 978-9350404324.
- Suchitra Bhattacharya (2017). Mitin Masi Samagra (in Bengali). II. Kolkata: Ananda Publishers. ISBN 9350406063.
- "Here's the first-look poster of Arindam Sil's Mitin Mashi film - Times of India". The Times of India. Retrieved 4 July 2019.
- BookMyShow. "Mitin Mashi Movie (2019) | Reviews, Cast & Release Date in Adilabad". BookMyShow. Retrieved 3 September 2019.