Pattanapravesham () is a 1988 Indian Malayalam-language detective comedy film directed by Sathyan Anthikad and written by Sreenivasan. It stars Mohanlal, Sreenivasan, Karamana Janardhanan, Ambika and Thilakan in the lead roles. It is a sequel to the 1987 film Nadodikkattu, Mohanlal and Sreenivasan reprises their roles as Ramdas / Dasan and Vijayan, respectively. The plot follows Dasan and Vijayan who are now C.I.Ds in Tamil Nadu Police, who are charged with investigating a homicide case. The film was produced by Siyad Koker under the banner of Kokers Films.
Just six months after the events of the prequel, CIDs Ramdas and Vijayan are called to Kerala to solve the murder of a police officer. The two incompetent and clueless men find themselves facing a dangerous crime syndicate led by Prabhakaran Thampi (Karamana Janardanan Nair) that deals in drug trafficking. In addition, Anandan Nambiar (Thilakan), the man they put behind bars in Nadodikkattu escapes from jail. The film was a critical and commercial success. In 1990, Priyadarshan made a sequel titled Akkare Akkare Akkare.
Plot
Ashoka Varma is a police officer trying to prevent smuggling. On the night he found the crucial evidence needed, he was murdered in his house. To find the murderer, Kerala Home Minister invites CID Ramdas / Dasan and Vijayan to Kerala.
On the day they arrived, CI takes them to their residence. They mistake Damu their cook for the murderer and beat him up. Due to Damu's injury, they take their supper in a hotel. In that hotel, Ramdas overhears a conversation and mistakes Isaac and Prof. Vidyadharan, two bird watchers, as the murderers. After the supper, Dasan and Vijayan walk along through streets and run into Isaac. When they try to follow him, they are shot at and ambushed by a group of villains and a fight breaks out. After the fight, they are saved by Prabhakaran Thampi, the real smuggler, who pretends to be a mill owner involved in a lot of social service projects. Prabhakaran Thampi advises Dasan and Vijayan to withdraw from the investigation told that there are many officers, who were investigating this case, have been murdered and that he does not want the duo to share their fare. Dasan and Vijayan are frightened but they put on a brave face before him.
Dasan and Vijayan decide to go undercover and start the investigation. With the help of Dasan's idea, they dress up as Mapilla umbrella repairmen. While investigating, an old woman gives them an umbrella to repair. They try to ask her about Isaac but she is not interested. They do a bad job in repairing the umbrella. At that time the woman's daughter-in-law Shobha arrives there and she spots Vijayan's fake beard and realizes that they are not genuine repairmen. Suspecting that they are thieves, the women raise the alarm and neighbours gather to catch the "thieves". The duo run away from there, leaving behind their repair kit.
After that failure, Vijayan and Dasan dress up as Tamil parrot Tarot diviners, based on Vijayan's idea. When they reach a bus station, Shobha too is there. She recognises them and alerts the other passengers that they are thieves. The local people get hold of the duo, and beat them up and take them to the police station. The CI reaches there and informs the local people that the duo are CID agents from Tamil Nadu. When the duo leaves the police station, Shobha apologises to them, and Ramdas accepts the apology.
After that day Ramdas arrives at Shobha's house and gives them a new umbrella as a replacement for the one he broke. Shobha gives him tea, but at that time he sees Isaac and runs after him, without drinking tea. He follows Isaac and finds his abode.
In the DIG's office, Dasan and Vijayan tell the officers that they have found the murderer and they will arrest him with all necessary proof. When they come out of the DIG's office they meet up with Prabhakaran Thampi who has come there to invite DIG for the stone-laying ceremony for a hospital. Thampi enquires about the investigation. The duo tells him that they are close to catching the culprits, who are masquerading as pillars of the society (referring to Isaac) and that they will unmask them. This frightens Prabhakaran Thampi. That night, when they return from the cinema, they are attacked by a masked man (Thampi's sidekick) in their house acting on the behest of Prabhakaran Thampi. They fight with him and take his mask from his face and one of his shoes, but he manages to escape from there, but unfortunately for them, Damu wears the mask.