Firepower (aka Fire Power) is a 1979 British action-thriller film directed by Michael Winner and starring Sophia Loren, James Coburn, O. J. Simpson and Eli Wallach.

She learns that her husband, who worked as a chemist, discovered that his employer had made a contaminated drug that resulted in patients contracting cancer.

The US government would like to be able to find and bring charges against this mysterious Stegner, who hides his face from the world and his income from the tax department.

[8] According to director Michael Winner, producer Lew Grade had fully expected Charles Bronson to co-star with Loren.

With much of the pre-production crew already on location in the Caribbean (Saint Lucia), Grade wanted to shut down the production when Bronson pulled out.

Realizing how much money he had already sunk into a film that had not properly secured its star actors, Grade saved face by moving ahead and using James Coburn as a replacement for Bronson.

[15] Victor Mature makes a cameo at the request of director Michael Winner, who wanted someone instantly recognisable for the role of one of the richest people in the world.

However, there's a nice chemistry in the teaming of Miss Loren, Mr. Coburn and Mr. Simpson, each of whom has an unusually physical presence on the screen.

He approved of the performances, but expressed disappointment that Victor Mature barely had any screen time and was not central to the plot and that Coburn's double role wasn't used to better effect.

[13] The review in Variety noted: "If the story becomes too tough or tiresome to follow, or the action grows tepid and repetitive, there’s always the beautiful scenery of the glamorous Caribbean locales.