That Dangerous Age
If This Be Sin
United States Theatrical release poster
Directed byGregory Ratoff
Written byGene Markey
Based ona story by Ben Simcoe based on the play Autumn by Margaret Kennedy and Ilya Surguchev
Produced byGregory Ratoff
StarringMyrna Loy
Peggy Cummins
Richard Greene
Roger Livesey
CinematographyGeorges Périnal
Anchise Brizzi (Italian sequences)
Edited byGerald Turney-Smith
Music byMischa Spoliansky
Distributed byBritish Lion Films
Release date
5 September 1949
Running time
98 minutes
CountryUnited Kingdom
Box office£176,577 (UK) [1]

That Dangerous Age is a 1949 British romance film directed by Gregory Ratoff and starring Myrna Loy, Roger Livesey and Peggy Cummins.[2] It was adapted from the play Autumn by Margaret Kennedy and Ilya Surguchev. The film was released under the alternative title of If This Be Sin in the United States.[3] It was shot at Shepperton Studios and on location in London and Capri. The film's sets were designed by the art director Andrej Andrejew.


Sir Brian Brooke, a famous attorney, collapses while acting as defense counsel in a high-profile murder trial. Doctor Thorvald informs his (second) wife Cathy that Brian needs to rest for six months or he will die; Brian is also temporarily blind. They and Brian's daughter Monica relax in Italy.

They receive an anonymous letter accusing Cathy of carrying on an affair with Brian's junior partner, Michael Barcleigh. Brian's lawyer instincts makes him believe it, until Cathy reveals that Michael has confided to her that he is in love with Monica. Brian is apologetic, and delighted by the news. However, Cathy has lied, and the letter is correct.


Comic book adaption


  1. ^ Vincent Porter, 'The Robert Clark Account', Historical Journal of Film, Radio and Television, Vol 20 No 4, 2000 p489
  2. ^
  3. ^ IMDB If This Be Sin
  4. ^ "Movie Love #2". Grand Comics Database.
  5. ^ Movie Love #2 at the Comic Book DB (archived from the original)