Narrator:  “This is where it started and ended.  In the top secret laboratory of world famed scientist Dr. John Bellow.”

Being conspicuously on top of a hill with a 300 foot tower on its roof, I’m not sure how top secret it is.  But it is, at least, secure as there are fences and guards, and history has shown us that no one can cross that kind of border.

Security Chief Steve Conway enters and says he has finished his assignment here.  He will be going on to set up similar security for Dr. Hayes.  Dr. Bellow is sorry for “what I got Hayes into” and “all this blasted secrecy”.  Conway says their work is more important than the H-Bomb.  Bellow still wonders why Conway won’t allow  Hayes and him to at least work together.  I guess it’s like not letting the guys with the formula for Coke fly on the same plane, or the guys who invented New Coke being booked together on Malaysia Airlines 370.

Hmmmm, the telephone that should never ring rings.  Washington had agreed to communicate only by courier, and no one else has the number.  Conway picks it up.  The caller asks if this is 727J ^[1] and Conway says it is.  The caller asks to speak to Bellow, but says he would not know his name.  What the heck — we cut to a guy recording the call on a reel-to-reel tape recorder.  Where’s our security chief?

Conway hands Bellow the phone and runs to an adjoining room.  Oh, the recording guy works there for Conway.  Wait, that phone is never supposed to ring.  WTF does this guy do all day?  Anyhoo, excited at finally having a purpose, he traces the call.  The caller asks if Bellow will be there in 30 minutes.  He says yes, but Conway tells him he will have to leave for his own safety.  The soldier traces the call to a hotel occupied by the government.  The lab bursts into flames, killing Bellow.

The investigation begins at the hotel.  The Communications Chief tells Colonel Davis that Conway came in at 4:30 and asked how to contact Bellow.  The Chief gave him the phone number to the lab — wait, I thought no one had that number!  Conway — at least according to four witnesses, it looked like Conway — made the call to Bellow then left the hotel.

Conway says Bellow was working on a new rocket propellant capable of inter-planetary travel.  Davis says it is workable and could be finished in a few years.  He orders Conway to fly to Dr. Hayes’ lab as he is “the 2nd most important man on this project.”  Uh, they did hear about the 1st most important guy getting blowed up, didn’t they?  Hayes gets a call similar to the one Bellows got, and he too is soon dead.

Dull story short, they figure out the scientists were fried by high frequency sound beams which makes the title of the episode a complete non-sequitur.  They figure out how to reflect the beam back to the source and kill people who shot it.  But were they people or aliens?  How did they imitate Conway?  Why did they call first?

Other Stuff:

• [1] What is 727J?  Is this a secret code name?  The Base designation?  Is he confirming he dialed the correct phone number?  I get the KLondike5-#### format, but why does this switch back to a letter at the end?

Ladies and Gentlemen, Johnny Cash . . .