The 1950s-set, mystery drama will be broken up into two adventures -- The Secret Adversary and N or M?
The series is being directed by Edward Hall. Episodes 1-3 were written by Zinnie Harris, while the following three installments were penned by Claire Wilson.
"In bringing these thrilling stories to the screen, it is our ambition for Tommy and Tuppence to finally take their rightful place alongside Poirot and Marple as iconic Agatha Christie characters," Walliams said in a statement. "I was first drawn to the delicious notion of a married couple solving crimes together, and the more I read of the Tommy and Tuppence novels and short stories, the more I realized they are among Christie's very best work."
"The first Tommy and Tuppence novel was published in 1922 and my grandmother would be thrilled to see her crime-fighting team reinvigorated for the BBC over 90 years on from when she first brought them to life," added Mathew Prichard, chairman of Agatha Christie Ltd.