Starring Sam Neill, Lisa Harrow and Rossano Brazzi, the film tells the progression of the now adult Damien Thorn to a position of earthly power, set against the countdown to the Second Coming and attempts of a group of priests to kill the Antichrist.

Having fully embraced his unholy lineage and having run his company for seven years, Damien now attempts to reshape his destiny by halting the Second Coming of Christ.

Learning of his assassins and killing all but DeCarlo over time, he proceeds to mold Reynolds's young son Peter into a disciple by playing on the boy's desire for a father figure.

A week after a string of 31 infant deaths, Reynolds encounters DeCarlo and he reveals Damien's true identity to her while giving her evidence of the murders.

Agreeing to help DeCarlo, Reynolds tricks Damien with the promise to bring him to the church ruins where the Christ child is in exchange for Peter.

[citation needed] Lisa Harrow said one of the most difficult sequences to shoot for the film was the death of the first priest in the television studio where her character Kate Reynolds interviews Damien.

Later, the title was adjusted to Omen III: The Final Conflict in home releases in order to accentuate its link to the other two films in the cycle.

Instead, Goldsmith composed an all-new theme for the character of Damien introduced during the opening credits which emphasized robust tragedy over the more horrific sound of its prequel scores.

Goldsmith also composed a new theme for the rebirth of Christ first introduced at the end of "Main Title" and later given full Romantic treatment with orchestra and choir at the film's climax in "The Final Conflict".

[9] Roger Ebert gave the film 2 stars out of 4, writing that it became "a growing disappointment, as we realize that the apocalyptic confrontation between the forces of good and evil is being reduced to a bunch of guys with Italian accents running around trying to stab Damien in the back.

"[10] Ebert and Gene Siskel also gave the film "No" ratings on their TV show, finding the movie to be boring and small-scale relative to the material it was trying to present, and concluding they were happy that the OMEN series had come to its stopping point.

"[11] Sheila Benson of the Los Angeles Times praised the film for mostly avoiding "the sort of tacky, splashy deaths" of the first two entries and concluded that Baker "has rounded off the gaudy trilogy with the most surprising qualities possible: intelligence and elegant visual style.

"[15] John Marrone of Bloody Disgusting said that "[The movie has] some gore and darkness, but nothing compared to the first two – even Jerry Goldsmith's soundtrack is awkward – a little too 'noisy' and overdone.

[17] In 1991, another sequel, Omen IV: The Awakening, was produced for television in a failed attempt by 20th Century Fox to revive the films as a horror franchise in the style of Halloween, Friday the 13th, and A Nightmare on Elm Street.