Continuity: When Dana and Johnny are drinking wine, the amount in the glasses change between shots. Also whenever they pretend to drink, if you watch closely the liquid in the glasses doesn't even so much as touch their lips when they drink.

Plot hole: The female police officer has a theory that Johnny was the Strangler in the case the papers claimed he helped solve but this hardly makes sense. If she was researching him as was seen in the episode, surely it would have said something about Johnny being in a coma during the bulk of the murders since the story was about Johnny.