[1] The film stars Arulnithi and Avantika Mishra with a supporting cast including Karu Palaniappan, Charandeep, Thalaivasal Vijay, Ramesh Khanna, and Uma Riyaz Khan.

[2] The film's soundtrack and background score are composed by Ron Ethan Yohann and Kaushik Krish respectively, with cinematography by Aravinnd Singh and editing by Ganesh Siva.

The inspector, while getting his details, recognized that he was the same Kali who had suffered from mental illness since childhood and had been involved in the construction of D Block.

Later, Arul sees some photos taken by his friend in the forest and realizes that Kali had been standing behind them, and that his next target is Maya.

They inform the police and wait for them to arrive, but an enraged Kali returns to the hostel and tries to kidnap Shruti.

The film marked Arulnithi fifth project with Aravinnd Singh after Demonte Colony (2015), Aarathu Sinam (2016), Iravukku Aayiram Kangal (2018) and K-13 (2019).

[7] The songs were composed by Ron Ethan Yohann and Kaushik Krish, while the latter did the film score.

The first single from the film titled "Ice Katti Kuruvi" was released by Think Music India on 4 February 2022.

D Block marks the debut of Eruma Saani Vijay Kumar, a popular YouTuber, and he has a long way to go in terms of writing for the screen.

"[12] Vignesh Madhu of Cinema Express gave the film 3 out of 5 stars and wrote, "D Block has more such moments to prove that 'Eruma Saani' Vijay Kumar is a promising filmmaker in the making.

If only he had paid more attention to making the first half more interesting with less focus on the comedy and romance portions, this film would have been a wholesome thriller.

"[13] Indiaglitz rated the film to be 2.25 out of 5 and stated, "Go for this one if you fancy psycho thrillers and if your expectations are minimal.

"[14] S Subhakeerthana of OTTplay gave 1.5 stars out of 5 and stated that "Please binge-watch your favourite film on Netflix instead of wasting your time on D Block.".