Pilot episode claims to occur in 1938 but shows video of Boeing 314 Clipper taking off. Clippers were not put into service until Feb 1939.
This program was set in the late 1930s, yet pilot Jake Cutter is supposed to be a former Flying Tiger who occasionally tangles with Japan's Mitsubishi Zero fighters in his new South Pacific home. Two problems: 1) the Flying Tigers weren't even in existence at this time, and 2) neither were Zero fighters.