No.20 Madras Mail is a 1990 Indian Malayalam-language comedy thriller film directed by Joshiy and written by Dennis Joseph from a story by Harikumar. The film stars Mohanlal in lead role and Jagadish, Maniyanpilla Raju, M. G. Soman, Ashokan, and Suchitra Murali in supporting roles, while Mammootty appears in an extended cameo as himself. The background score was composed by S. P. Venkatesh while the song was composed by Ouseppachan. The plot follows three youngsters who are embroiled in the murder mystery of a young woman in a train journey from Thiruvananthapuram to Madras. No.20 Madras Mail was released on 16 February 1990 and received positive reviews. Almost half of the film was shot inside a train. Four years later, the film was remade in Hindi as Teesra Kaun by Partho Ghosh. Plot The train No.20 Madras Mail to Madras starts from Trivandrum Central railway station. R. K. Nair, a Kollam-based businessman takes the first class coach to Madras with his wife Geetha and daughter Devi from Kollam Junction. Tony Kurishingal, along with his friends Hitchcock Kanjikkuzhi and Kumbalam Hari boards the same coach from Kottayam. Tony is the son of a wealthy businessman, Kurishinkal Kariyachan, Kanjikuzhi is a detective novelist and Hari is a young politician. The three of them are going to Madras to see a cricket match, a cabaret, and to make attempts to make Kanjikuzhi's novel Vaazhikuzhiyile Kolapathakam a movie. All three are drunk. After seeing Devi, Tony and friends make several attempts in getting a seat for Tony in the same coach of Devi, with the help of ticket inspector Nadar, but with little success. While doing so, Tony gets into heated arguments with Nair and Sunil, who shares the same coach. Film actor Mammootty boards the train from Thrissur and gets into the same coach. Nadar leaves the train at Palakkad after giving company with Tony and gang and the new TTE Chokalingam / Choki assumes duty. Tony and his friends visit Mammootty and become friends with him. Meanwhile, Tony tries to flirt with Devi while she returns from the toilet, which causes Tony to land in trouble with Nair, but on Mammootty's intervention the matter is settled. In the morning, as the train reaches Madras, Devi is found murdered in the toilet. Suspicion lands on Tony and friends and they run away from the spot in fear. The investigation is carried out by