Just watched that episode. That reveal wasn't worth waiting for. We've all thought we've seen people we know, then realise oops it's not actually them. Disclaimer: I am short-sighted. Maybe he needed to go to Specsavers.
Also, wasn't Dee from Tasmania? So presumably lots of family/friends in the area to recognise her.
Harold was missing, presumed drowned, came back years later with amnesia. It's been done. They've dragged this whole storyline out way too long now and it's become boring. It could've been so much better. I want Dee to stay dead now. Unless she's an octuplet.