Very poor. This series has been running on empty for a while to be honest. What started as a serviceable if unspectacular potboiler has become a dreary succession of cliches. They seem more concerned with style over substance - re-creating tropes and references cineastes will recognise and nod at approvingly. In this episode, the "twist" is telegraphed in the opening seconds. There are some laughs along the way (e.g. The arrival of the wife), but really, when you get to the "dramatic" final line, you realise that that was the first thing they came up with, then wrote the episode around it. It's actually embarrassingly lame.
Review of Love is a Stranger
