Storyline Query

Hi there, I have a vague question. There was an episode with Charlie's character, either before or after he got together with Katerina. Well, I remember him falling for a girl (blonde) and she was a tarot reader or something-lived in a caravan. This episode is very blurred in my memory so if anyone could fill in the gaps-plot,characters involved, episode name/number and theb actress that played the girl, I would be really grateful.xx