I think that was the happiest episode of the second series to date.
In real life Jennifer Worth lost contact with Jimmy before he ever got married or engaged. The first and only time she met his wife was when she bumped into him years later (in the 70s or 80s I think) in a shopping centre or DIY store looking very hen pecked by a very bossy looking woman. So obviously the current story is loosely based on her recollection of that encounter but 99% made up.
I like the way they're spreading the story lines around all of the characters this time. Jenny is interesting but so are Trixie and Cynthia. The storyline with the nun and the doctor is also very interesting. They have always given the impression that Sr Bernadette is a bit envious of the other nurses and their freedom to go dancing, meet men etc so it will be interesting to see how they play this one out.