Jessica is in London, and The Laurel and Hardy of the family (Grady and Donna) are house sitting, unknown to them they're in the presence of a valuable article.
It's easy to slate this one, and let's be honest, as a mystery, it's absolutely terrible, but as a comedy, it works really well. The plot is like something from a comedy show, Grady and Donna make for an amusing duo, Aunt Jessica is happily in a studio down the road.....sorry, a Hotel room in London, and an Oriental martial arts Master is terrorising Cabot Cove.
The accompanying oriental themed music makes me chuckle, it's a little over the top.
Being an English woman herself, Lansbury would know that meeting The Queen is one of the most ludicrous elements introduced so far. I'm not sure Emma singing sea shanties would be suitable royal entertainment.
It's funny, but this is one of the episodes I remember vividly from my childhood, and I think for a ten year old it would have huge appeal, as some of the characters are like something out of a cartoon.
It does feel like a waste of David Warner, he'd have made a wonderful English villain, he doesn't have much to do sadly.
Overall, it's a shocker, but it's also a bit of fun. 7/10.