[What's the name of this movie?]

I can't remember the name or the actors in this movie..can you help me? A couple is happily married until one day a man from the husband's past shows up and claims that the woman's husband isn't actually her husband, but he is another man impersonating him. According to the man making the accusation, he and the woman's husband, and the man who claims to be her husband, were in the war together. They were very close friends and the woman's husband talked about her all the time (making it easy for someone to know enough about her to pass as her husband). As I recall, the woman's husband was killed, and the other man (who I believe was in some way responsible for her husband's death) was somehow able to make it appear that it was himself (not the woman's husband) who was killed, and he came home, pretending to be the man she loved. At first she was convinced that the man was really her husband, but then she began to have doubts. They ended up in court, where the whole story about the three men came out, but it was never completely clear whether the man was actually her husband or not. Nevertheless, she decided to believe him. The whole story was strange, but very intriguing. I didn't see the beginning, so I don't know how this man was able to convince her that he was her husband (maybe he was...you never know for sure!). I believe the movie was set in England..the members of the court wore white wigs.

[TCM show reminders]

It's been a few days since I visited the TCM website, and it appears that they have made some changes. I usually search the schedule for movies starring my favorite actors and have TCM e-mail me with a reminder prior to the day the movie is playing; however, I can't find the link to the advanced schedule search. Can you help me?????????