Haven. As much as I have a fondness for the episode. It just doesn't work. There's just way too many coincidences and "because we need a plot to happen" elements in it.
1) What is even the purpose of Genetic Bonding in Betazoid society? If it's goal is to create powerful telepaths then genetically bonding a half-Betazoid, who already has diminished esper powers to a full human seems counter-productive.
2)Why are Wyatt's parents so adamant on honouring a Betazed tradition when nobody else is? And if they are so adamant about honouring it, why are they opposed to a Betazoid Wedding Ceremony then? Do they love Betazoid traditions or not? Make your minds up! (if Wyatts apparent latent psy powers were the reason, then that should have been mentioned, instead, everybody except Wyatt and Ariana seem oblivious to him even having those powers)
3) Why does everybody, including the plague ship show up at Haven by pure coincidence?
4)Why doesn't this episode take place at Betazed instead? Literally all they would have needed to do was changing the name of the planet in the script and it would instantly make more sense.
5) The conflict is resolved in a very anti-climactic fashion with no input or action by Deanna. Really, in an episode supposedly centred around her, Troi ends up being the most passive of all the characters.
It just doesn't work.