Mr. and Mrs. North are fictional American amateur detectives. Created by Frances and Richard Lockridge, the couple was featured in a series of 26 Mr. and Mrs. North novels, a Broadway play, a motion picture and several radio and television series. The radio mystery series aired on NBC and CBS from 1942 to 1954. Alice Frost and Joseph Curtin had the title roles when the series began in 1942. Richard Denning and Barbara Britton star in this episode.