Dr Radkin is a non-canonical character created for The Blue Geranium, Episode 15 of NHK's anime series Agatha Christie's Great Detectives Poirot and Marple. Radkin is a doctor who is summoned by the Pritchard household after Mary Pritchard is found dead. Radkin tells Miss Marple and others that he examined the body and is certain she died natually of a heart attack. On further questioning by Miss Marple, he says there was a faint whiff of gas in the room.
The doctor in the original story is not named. The voice actor for Dr Radkin is not credited.