While Phelps as the fake doctor examines Edward Granger with the phony alien medical equipment the sound effects are from the Star Trek (1966). Furthermore, when the "alien lights" were outside Granger's room, the sound made was that of the mind emptying chair on the Star Trek episode "Dagger of the Mind"
The helicopter (registration number N209D) is a 1968 Bell 206A JetRanger. This helicopter has a Rolls Royce/Alison 250 turbine engine. It sounds much different than what is heard.
The Saturn V model in the den was used in Earth II which ironically aired two days later.