If you are a die-hard fan of the series and believe that the writers can do no wrong, please do us both a favor and skip this review.
Part of what I do in my reviews is try to catch the really spectacular entries and also the not-so-spectacular ones.
I love this series but this episode represents the writers running into a brick wall .... and dragging the viewers along for the "thump." The song and dance number is a mimic of Joss Whedon's famous Buffy episode where the characters did the entire episode in song. The Buffy trope was brilliant, iconic, and a part of TV history. This mimic was entertaining, interesting and yet strangely out of place in an episode which can best described as atonal and below the writing quality we have come to expect.
The episode itself is much too talky, full of strange situations that go nowhere, crosses and double-crosses, anxiety ... and generally all the telltales we see when -- as happens occasionally even on a great series -- the writers lose control of a script and nothing works in front of the camera quite as well as it did on paper.
However, for fans (and I am a fan) the ongoing incredible characterization of Anna Jarvis by Lotte Verbeek saves the day, even though she is on-screen for only a small scene. Lotte is doing more for the institution of Marriage than any actress since the film career of Myrna Loy (a reference only IMBb members of a certain age will understand). And while this reviewer considers himself to have a good ear for dialect, I have no idea what nationality her accent represents but it is so distinctive and so appropriate for the part, I could listen to her recite the phone book.
Still a great series, but definitely not the single best iteration of it.