Radio: "The Hornet Goes Underground"

On only the second post about the Green Hornet radio program, it appears that we will need to correct, or at least clarify, something stated in the first.

We shared "Trouble Hits the Trolleys" on May 19th. Our source for that episode, Nikola Tesla Wireless Radio, stated that it had first aired in 1936 and was the seventh such adventure to be released.

Several other sources of information stated that the episode was first broadcast in 1939. How can there be a three-year discrepancy?

Wikipedia might have the explanation. 

I Love Old Time Radio lists its air date as June 8th, 1939. It's possible that "Trolleys" was the seventh episode to be recorded regularly but it seems unlikely to have been the seventh aired.

Since we're speaking of ILOTR, let's share one of their offerings. As pointed out in the subject line, this is The Hornet Goes Underground from early October 1943. Being that it involves Nazi sabotage, the stated air date seems reliable in this case.