Luther Gillis tells Magnum that he tried out for the St. Louis Browns in spring training in 1954. In reality the Browns moved to Baltimore between the 1953 and 1954 seasons, and became the Baltimore Orioles.
TV writers are not known for accuracy. Higgins refers to the Mau Mau rebellion as a "war" and he talks about "returning to the front." This was not a war in any conventional sense. It involved raids to drive out, and sometimes kill, the colonial settlers, with the chef weapons being "pangas" (machetes) and "rungus" (sheleighly-like wooden clubs). In contrast, the British had rifles, revolvers, machine guns, and light artillery. There never were any battle lines. Also, while the rebellion lasted a number of years, it turned out differently than in a number of other colonial lands (the French possession of Vietnam being a contrasting example) in that Britain intended to hand Kenya (and its sister countries of Uganda and Tanzania) over to local rule. The key issue (and the ultimate reason for Kenya's success) was that the British made a huge effort to train the locals in the complexities of running a national government and in managing the infrastructure and financial matters. By not simply capitulating and by not fighting the kind of war described by Higgins, Kenya emerged as one of the most stable and prosperous former colonies in history.
When Higgins and Luther go to the docks to look for Warren, as the camera pans over the garbage bin, you can clearly see the actor inside breathing.
Lightstands can be seen reflected in the Buick's door as it is opened during Higgins blackmail payoff.