A polling at Classic Jonny Quest.com ranked this episode #2 among fan favorites.
The interceptor fighters that were scrambled at the beginning of the episode appear to be inspired by the supersonic XB-70 Valkyrie, which made its first flight in September of 1964.
Star Trek fans have noted that the opening sequence of this episode is very similar to that of a first season Star Trek (1966) episode entitled: Tomorrow Is Yesterday (1967).