Hercule Poirot

I watched this episode in which Hercule Poirot,a detective solves a mystery in which a girl wants to find out how and who had murdered her parents.They usually used to think his mother killed her father and then committed suicide or the other way around.They interview people who were around on that case.After interviewing a lady who had escaped to a backstreet in Paris.Then he gets to know about more detailed whereabouts and then gets a better opinion and starts looking to it more closely.Guess how he gets the case?All because of a dog who was deeply out of this case.Nobody even cared.But you never know it might help.And it did!In fact almost the whole mystery.I'll tell you about this mind-blowing mystery.The girl's mother was already killed by her identical twin and her identical twin killed his father an then suicided.But Poirot got to know that her dog instantly barked at her and was not attracted.The lady in Paris was lying that the twin sister sleepwalked and fell down a cliff.First I used to think Aghatha Christie was just some ordinary writer you would have in every town.But it was a flunk.Now I found out why people read her books so much!Her writing surely is unique!