Häikäilemättömät was released in the year 1955。Häikäilemättömät is also called as The Big Combo, Rajada de Morte, Polizia bussa alla porta, Hämndens skugga, Association criminelle, Aristokratai tou eglimatos, Geheimring 99。

Police Lt. Diamond is told to close his surveillance of suspected mob boss Mr. Brown because it's costing the department too much money with no results. Diamond makes one last attempt to uncover evidence against Brown by going to Brown's girlfriend, Susan Lowell.

Häikäilemättömät actors and actresses include Earl Holliman, Richard Conte。