I think that the Meg episode was nicely underplayed actually, but obviously the two characters / actors did have chemistry, possibly because they knew each other because they had worked together before, and were pleased to be working together again (or may be because they are both good actors!!)
I was never completely convinced about Lucy Griffiths acting, I have to say, but she does have some good scenes with Richard, and I suppose you have read that article when she said that she loved working with Richard.
Perhaps you might not have heard that she has gone to Hollywood and has been cast in something, might be a pilot for a potential TV series, what I do remember is that it is about ZOMBIES!!!
Perhaps this is continuing a trend for Richard's former co-stars, first Andrew Lincoln in The Walking Dead, and now Lucy Griffiths in Awakening (just looked it up!!)
BtW thanks for that John Porter vid Spiro!