The cast makes this one worth watching: Burt Lancaster, Paul Henreid, Claude Rains (at his silkiest), Peter Lorre, Sam Jaffe. The character Corinne Calvet plays is a screenwriter's dream since she's likely to spark unexpected changes in each of the male characters, but as an earlier contributor pointed out, Calvet isn't up to the part. It's hard to believe that a man such as Burt Lancaster's character could become so smitten with her.
The South Africa setting adds interest to the proceedings and the plot uncoils in skillful fashion until the last reel or so when the rush toward climax becomes somewhat delayed and diffused.
Burt Lancaster's whipping at the hands of Paul Henreid no longer includes details mentioned in the book "Sadism in the Cinema," which implies that some footage has been cut from prints. Even in abbreviated form, however, the scene conveys the hint that the real emotional bond in the movie is not between Lancaster and Calvet but between Lancaster and Henreid. Henreid's brutally sublimated desire for Lancaster is certainly understandable since Burt never looked better than he does here.