Dr. I.Q. The Mental Banker Quiz Show was a popular radio and television quiz program that aired from 1939 to 1959. The show's format was straightforward and featured host Lew Valentine asking questions from the stage to audience members, who served as contestants. Broadcasted from theaters in various cities across the nation, the show handed out cash prizes in silver dollars and featured other fun segments like the Biographical Sketch and The Lady in the Balcony quiz.

The success of the show led to a Saturday morning spin-off, Dr. I.Q. Jr., which was similar to the adult version but catered to younger audiences by giving silver dimes as prizes and offering rewards such as Schwinn bicycles. Throughout its run, Dr. I.Q. had various sponsors, including Mars Candy, the Vick Chemical Company, and Embassy Cigarettes. In its later years, the show transitioned to television, airing on ABC from 1953-54 and resuming from 1958-59.