The comment by Melvelvit also on this site is fantastic...and I think he is right. I have only just discovered this - yes - lurid thriller - made in the final days of RKO, and it is as much fun in a demented way as it is genuinely interesting. Now that I have seen the film again with Melvelvit's believable comments under my, er, belt, well, it might just be Rod Steiger after all, and not poor Diana at all who is the genuine Unholy Wife. All that (later) Baby Jane and Charlotte campery can be seen it its seed form in this well produced, decorated stylish dark mansion melodrama...complete with trashy rodeo handsome hick and lusty barfly floozies for added tarty extras. Imagine running a cinema in the mid to late 50s and having RKO call you once a month offering double features of any of these mix'n'match titles: SON OF SINBAD / THE FRENCH LINE / SLIGHTLY SCARLET / INFERNO / THE UNHOLY WIFE/ THE GIRL MOST LIKELY etc. What a life there was for some excited cinema goer!