Co-written by Rensil D'Silva, Sameer Arora, Jeethu Joseph and K. Manikandan, it was jointly produced by Viacom 18 Motion Pictures and Parallel Mind Productions.

15 years later: Gnanamoorthy is a politician in Mettupalayam, Coimbatore District, who lives with his wife Padma, daughter Parvathy, and his mother who uses a wheelchair.

Parvathy spends her days in sorrow, hoping that her aggressive younger brother Saravanan, who had left home 15 years ago, will return.

Finally, with a clue from Sanjana, Vicky deduces that Saravanan had returned home the night of his disappearance - he was a drug addict who had fought with his family and was the reason for his grandmother's paralysis.

He believes that out of anger over Saravanan hurting his grandmother, Moorthy killed his son accidentally and used sympathy to earn votes.

15 years back: After Saravanan had fought with Padma and Parvathy, he pushed his grandmother down the stairs, causing her to be hospitalized.

Saravanan began choking her and in desperation, Parvathy grabbed a nearby showpiece and accidentally slit his throat.

In February 2019, it was announced that Karthi and Jyothika would be sharing screen space together for the first time under the direction of Jeethu Joseph.

[10] The album features four tracks with an instrumental theme music, and the lyrics for the songs were written by Vivek and Karthik Netha.

[12] while Ravuri V. Srinivas, acquired the Andhra Pradesh and Telangana distribution rights under their Harshitha Movies banner.

[14] Sify rated 3.5 out of 5 stars stating, "Thambi is an engaging watch for the solid performances of the lead actors and very unlike most thrillers you’ve seen recently.

"[16] Firstpost rated 3 out of 5 stars stating, "An impressive performance by Karthi powers Jeetu Joseph's engaging thriller.

"[18] India Today rated 3 out of 5 stars stating "Thambi’s runtime seems to be a little longer and a taut screenplay would have made wonders to the overall film.

"[19] Behindwoods rated 2.5 out of 5 stars stating, "The twists, an engaging second half and powerful lead performances make Thambi a watchable suspense thriller.