William Harper Littlejohn

William Harper "Johnny" Littlejohn was a fictional associate of 1930s and 1940s pulp hero Doc Savage. Johnny first met Doc in a prisoner of war camp during World War I. Johnny was the only one of Doc's five associates who did not have a military rank. It was revealed in "Escape from Loki" that Johnny was in Europe in a civilian capacity.

Johnny is an expert in geology and archaeology. He is described as being tall and extremely thin, with black hair and a large nose. He is referred to as 'professor,' though we are never told which, if any, university he is associated with. In "", Philip Jose Farmer speculates on Johnny being a Professor at Miskatonic University and further claims H. P. Lovecraft's novel "At the Mountains of Madness" is Johnny's report of the M.U. expedition to Antarctica.

Johnny lost the sight in one eye during his experiences in the First World War. He wore a monocle over his blind eye, which was actually a magnifying glass he would use in field work. Doc later operated on the eye, restoring the sight.

Johnny loved to use big words, almost to the point of being incomprehensible (he never did this around Doc, knowing he would be instantly understood by his genius leader). His favorite expression was "I'll be superamalgamated!"

Johnny did not appear in many adventures, as his work would take him all over the globe.

In the 1975 film , he was played by Eldon Quick.