The talk discussed some of the poisons used in the plots of Agatha Christie, as described in Dr. Harkup's book "A is for Arsenic".

Dr. Harkup explained the details of three well-known poisons, Phosphorus, Strychnine and Arsenic, and showed that Agatha Christie's descriptions are accurate and detailed.   At Dr. Harkup's request, only one of the poisons is included in the video.