Pattaakathi Bairavan delivers a compelling storyline that is deeply rooted in Tamil cultural ethos, with Sivaji Ganesan's powerful performance anchoring the film. The screenplay is structured to emphasize dramatic tension, especially in the first half, which effectively sets up the emotional stakes and character motivations. The pacing in the initial segments is deliberate, allowing the audience to connect with the characters and their dilemmas.

The second half intensifies the narrative with heightened drama and confrontations, although some sequences tend to drag, slightly affecting the overall momentum. The film's songs, while melodious, do not significantly advance the plot but serve as emotional interludes. The background score complements the mood of the film, enhancing the dramatic scenes without overpowering them. However, the absence of a noted music director and limited information on cinematography suggest that these technical aspects were functional but not standout elements.

Overall, Pattaakathi Bairavan is a classic example of late 1970s Tamil cinema, relying heavily on star power and traditional storytelling techniques. Its strengths lie in the performances and emotional depth, while the screenplay's pacing and technical finesse show room for improvement.

Sivaji Ganesan: Commanding and emotionally intense portrayal of Bairavan, showcasing his versatility and screen presence.

Sridevi: Graceful and expressive, providing a strong supporting role that complements the lead.

Major Sundarrajan: Solid performance adding gravitas to the narrative.

Jai Ganesh: Effective in a supporting role, contributing to the film's dramatic tension.

Thengai Srinivasan: Provides comic relief with timing and subtle humor.

Jayasudha: Notable supporting role with emotional depth.