The character Steve Douglas (Fred MacMurray) makes another one of the series' rare but very oblique references to the departed character of the son Mike when he tells the General that "the first two boys" didn't get a heat rash as infants but "we did have a little trouble with Chip."
General Striker mentions taking a spare bracket assembly for his grandson, then begins to spin it. It is remarkably similar to a fidget spinner, which would become a fad some 50 years later.