Father Brown investigates a truly harrowing case for him, the tragic death of Sister Mary Magdalen during a service. The Police surgeon later discovers she died of Cyanide poisoning. Father Brown is on hand to chaperon Inspector Valentine as he begins his investigations. Sister Paul has returned from India to be at the convent, she is annoyed at being subordinate to the kindhearted Sister Gregory, the pair clash. Potassium Cyanide is kept under the watchful eye of Sister Boniface, but not under lock and key. Sister Paul is the next victim to fall, the exact same grizzly way.
Very good episode, the tranquillity of the opening is shattered by the shocking death of the nun. I love the Agatha Christie reference to Sparkling Cyanide, there are a few similarities with the format, but that's certainly no bad thing.
There is some impressive acting talent on display in this episode, what a wonderful trio of nuns. Roberta Taylor is awesome and wonderfully cast as the tough and unforgiving Sister Paul, Selina Cadell is brilliant as the soft and scatty Sister Gregory, and the ever lovely Penny Downie gives a great performance as Mother Augustine. Funny woman Lorna Watson is great too, she bounces of Mark Williams beautifully, fellow masters of comic timing! Hats off to the casting director for this one, it was a job very well done.
I would happily rate this episode as being excellent, one of the best so far. 8/10
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