Which British TV series is about an intelligence investigator trying to capture a mad killer named Villanelle?

The British TV series about an intelligence investigator trying to capture a mad killer named Villanelle (Jodie Comer) is titled "Killing Eve". This black comedy-drama spy thriller TV series is produced in the United Kingdom by Sid Gentle Films for BBC America and BBC iPlayer. The series follows Eve Polastri (Sandra Oh). She has the very difficult task of capturing the truly psychopathic assassin, Villanelle.

Eve's life as a spy is not adding up to what she had hoped. She started as a bored, very smart, MI5 security officer who was very desk-bound. Villanelle is a truly knowledgeable and talented killer, mercurial in mood. She loves to cling to the luxuries of her job. Eve and Villanelle go head to head in a fierce game of cat and mouse, each woman equally obsessed with the other. "It is the characters who make this series refreshingly entertaining and interesting to watch", says Sarah Barnett, BBCA president.