When the people are gathered near the hay wagon on the crest above the cabin in the hollow, a jet airplane trail is seen across the clear sky. At the time of filming, it could have been from a passing Boeing 707: the first commercial passenger jet, introduced the year before into service October 1958. The Douglas DC8 was brought into service September 1959 - two months before "Panic" was aired - probably too early to have been the passing craft when this was filmed.