Detective) is a 2017 Indian Tamil-language action thriller film written and directed by Mysskin, and produced by Vishal, who also enacts in the lead role with Prasanna.

The film follows Kaniyan, a private detective, and his associate Manohar, who investigates the death of a kid's pet dog which leads to a bigger criminal.

The film starts with IT company owner, Dhivakar, and his family celebrating his birthday, when a sudden lightning strike hits him and his son and burns them to death.

At a cinema, a man gropes a woman, and a small commotion ensues, which was stopped by ACP Paul Dhanarajan, who dies in the middle of a police conference three days later.

One day, a schoolboy named Naveen visits Kaniyan and Manohar with the case that his pet German Spitz (inaccurately identified as a Pomeranian) Nemo was shot dead and asked them to find the killer.

At the crime scene, he finds a tooth, whose owner is traced to be Swarnavel, a former university physics professor who lives alone and is now a stockbroker.

Kaniyan and Manohar meet Police Inspector Madhivanan and ACP Vijayakumar in a hotel, where yet another failed assassin attempt is made.

Later, as Naveen returns home from school one afternoon, he finds a Pomeranian puppy along with a note bearing Kaniyan's name in a basket at his doorstep.

Starring Vishal in the lead role as a detective, the film was titled Thupparivaalan and was formally launched at a ceremony in Chennai on 10 March 2016.

[12][13] Mysskin signed Ashvatt for the pivotal role of Swarnavel, after he was impressed by the actor's earlier performance in his film Pisaasu and Savarakathi.

[15] Mysskin revealed that he was inspired by the tales of Sherlock Holmes when writing the film and stated Vishal's character would resemble the detective.

[16][17][18] In August 2017, while filming an action scene, Vishal suffered a minor injury on his knee, while Vinay hurt his shoulders.

[22] M. Suganth of The Times of India wrote "[..] what sets Thupparivaalan apart from regular action thrillers is how it not only thrills us, but also makes us feel".

[24] The Hindu wrote "After the disastrous ‘Mugamoodi’, ‘Thupparivaalan’ was always going to be Mysskin’s trial-by-fire in the world of big budget commercial cinema.

With ‘Thupparivaalan’, Myskkin has opened up his universe to the common man, reminding us that there’s nothing as pleasurable as seeing someone sneak a bit of art into entertainment cinema".