From a review of Elise by cultbox.co.uk:
If we started by asking ‘How do you live after the War?’ we end up asking ‘How do you live with what you did during it?’ In the final section of the episode we discover that in Hilda’s case, she can’t live with what she has learnt. An unshowy performance by Ellie Haddington as Hilda makes her final, shocking action all the more moving.
As for Foyle himself, he and the late Hilda Pierce could hardly be described as bosom buddies but there’s a streak of honour and absolute integrity that runs through them both…
…which is why, no doubt, our final shot is of Foyle leaving Hilda’s funeral and very pointedly turning away from Dr Addis and any possibility of a future with her. Is there some hint of attraction there? Yes, probably. But the fact that she can live with the horrible truth that killed Hilda, means she can no longer figure in his world.