Mrs. Drysdale's nephew, "Jetstream" Bradford, is essentially a replacement for Sonny, her worthless son. Like Lance, who is still a Lieutenant after ten years, Sonny was still a sophomore in college after 19 years. Milburn was forced to find work for both of them. Even their mannerisms are similar. Presumably, Louis Nye was either unavailable or unwilling to reprise his role as Sonny.
Soupy Sales plays Second Lieutenant Lance "Jetstream" Bradford, who is just getting out of the United States Air Force. In real life, Soupy Sales served in the United States Navy during World War II.