The mystery is original enough but I'm not enjoying the Esther / Zoe stuff, apart from the way it parallels with Martha and Anne. Really Esther should spell it out to Zoe that her bad behaviour puts Esther in a difficult situation professionally, but mum also needs to praise daughter more when she does stay on track. Also this episode missed 'pre-twist' Richard - whilst I love there's a range of female characters, they do outnumber comedic Humphrey and Kelby, so Richard had filled a gap and balanced the show, plus he and Anne were super sweet together which contrasted with the mystery plot. There are the expected sad elements in this edition, but unusually, it lacks real laugh-out-loud moments. However, there's a lively nod to Humphrey's past life in the last scene - look out for a fun reference to an old friend in the closing shot.