During the same era, another type of private eye emerged on the TV scene. That was the more analytical and thoughtful type of sleuth. Two examples are "The Adventures of Sherlock Holmes" which ran as a syndicated series in 1954 and "The Adventures of Ellery Queen" which was first on from 1950-1952. These programs put the emphasis on the more cerebral aspects of the cases and eliminated much of the violence of some of their contemporaries. Ellery Queen challenged the viewer to put the pieces of the crime together and arrive at a solution. At the end of the program was usually a denoument to explain to the audience how Ellery figured out the case.
Another early style of detective show was the serio-comic approach which usually involved the comic interaction of a husband/wife or boyfriend/girlfriend as they went about the solving of a case. Examples of this style were shows like "Mr. And Mrs. North" (1952-1954), "Boston Blackie" (1951-1953), and "The Thin Man" (1957-1959).