Oru Viral

Oru Viral
Poster
Directed by	C. M. V. Raman
Produced by	Salvador Fernandes
Written by	Thangan C. M. V. Raman
Starring	Krishna Rao Thengai Srinivasan
Music by	Vedha
Cinematography	T. G. Sekhar
Production company	Associate Artists
Country	India
Language	Tamil

Oru Viral (English: One Finger) is a 1965 Indian Tamil-language mystery film written and directed by C. M. V. Raman. The film stars Krishna Rao and Thengai Srinivasan in their acting debut, along with K. Kannan, Prem Anand, Pandarinath, Malaysia Radhika, V. R. Thilakam and Meenakumari.

Oru Viral narrates the story of two sons of a rich man who is murdered, and the hunt for the murderer. Stories of a haunting skeleton circulate in the estate owned by the murdered man. An employee of the estate (Kannan), who is actually a convict on the run, is being chased by a detective (Srinivasan) who obtains work in the estate to keep tabs on him.

At a period when murder mysteries and detective stories were not exploited as genres in Tamil cinema, Oru Viral was a "surprise package", being made on a shoestring budget with artistes who were then newcomers or less popular. Krishna Rao and Thengai Srinivasan made their acting debut with this film, and the film's title became prefixed to Krishna Rao's name. Other supporting actors included K. Kannan, Prem Anand, Pandarinath, Malaysia Radhika, V. R. Thilakam and Meenakumari. Salvador Fernandez, also a newcomer, produced the film.

The music was composed by Vedha and the lyrics were written by Alangudi Somu. Two songs from the film — "Malligai Mottu" by P. Susheela, and "Vun Thevai" by her and T. M. Soundararajan — attained popularity.

Despite its low budget and lack of stars, the film was successful, being praised for the storyline and the way it was narrated onscreen. In September 2012, film historian Randor Guy stated that the film would be remembered for the "interesting storyline", the performances of the cast and the background score.