Fred's Suspicions
I'm a huge fan of Brief Encounter, and I think I've watched it enough times to know every scene intimately. However, the last time I saw it, I noticed a moment early in the film where Fred appears to be very aware that Laura is hiding a guilty secret.
The scene I mean is where Laura turns on the radio and tunes in to Rachmaninoff. When she goes to sit down, we can see Fred in the distance studying the crossword. A fraction of a second before the camera cuts to a close-up of Laura about to 'confess,' you can see Fred raise his eyes to look at Laura - and he appears to give her a hugely suspicious glare.
I've always interpreted Fred as being totally oblivious to Laura's secret until the final scene, but that moment has got me scratching my head. Apart from that very brief glare, there's nothing to suggest Fred had any suspicions whatsoever.
As this is the first time I've noticed this 'glare' of Fred's in about ten viewings, I wonder whether it was actually intended to be noticed by the viewer?