When her boss is replaced, Hannah realises she'll to have to find a way to keep the status quo.
Hannah's best friend from university arrives home from travelling, now with a fiancé in tow — charming vet, Rich. He offers Dan a job at his practice, but Hannah can't stand him.
Dan and Hannah are back at their old school. Hannah has been asked to make a speech in front of sixth formers attending a careers day, whilst Dan just fancies a snoop down memory lane.
Dan has finally booked himself in for an appointment at the STI clinic. There, under examination, he meets funny and free-spirited doctor Izzy.
When Dan and Hannah's neighbour asks them to look after the exotic fish in his flat for a few days. What could possibly go wrong?
Hannah and Dan's beloved drama teacher Mr Balcombe has died and Dan and Hannah have mixed emotions about the funeral.