Many years ago I was at a Trek convention and DeForest Kelly was speaking. He said his favorite episode was "The City on the Edge of Forever". I asked for his worst episode. He said "My worst is 'What Are Little Girls Made of?' Why? Because I wasn't in that one".

Scott is in charge of engineering, the entire operations division (all red shirts) and is the ship's second officer. He's in charge when Kirk and Spock are both gone. Since his post is not on the bridge, when Kirk and Spock both leave, usually a bridge officer takes "the conn," meaning they're in command until relieved, usually by Scotty. Scotty also often is the chief supervisor and technician of the ship's transporter, because it's the most critical and complex piece of equipment on the ship, other than the engines.

I still don't know what little girls are made of, but I very much appreciate whatever it took to make Andrea. Her loss is the real tragedy of this episode.

One of the great first season episodes and best Kirk ending line: “Roger Corby was never here”. Well known story of Andrea (Sherry Jackson) walking through the studio cafeteria wearing that costume and causing a sensation.

Scottie's job is to tell Kirk that whatever he's asking for is impossible; then to get it done in the nick of time. He's VERY good at this!!

This human / machine question is explored a lot more in Trek going forward. And the cool thing is that it doesn't always come up with the same conclusions.

Sherry Jackson is in this episode. She was in the 1978 The Incredible Hulk TV episode Earthquakes Happen.

What's that? Actor Ted Cassidy, who played Lurch on the Adams Family TV show. He also did the narrator in the beginning credits of the Incredible Hulk TV show.

“It looks like they’re having the Jello salad over dog food.” 😆

Ted Cassidy was a fine actor with a tremendous basso profundo voice which could inspire fear--or could be very warm. He will always be known as Lurch the butler in the television series based on Charles Addams' strange little cartoons for the New Yorker. He had a left-field hit with "Wesley", which is as far away from horror as you can get. It's on KZfaq. His son, who looks like him, helps keep his memory alive.

This episode was written by Robert Bloch, who's best known for writing the novel, "Psycho", which was adapted as a film, directed by Alfred Hitchcock.

“They’re wearing red shirts. Should I be worried?” Yes. Yes, you should. 😉

Ted Cassidy also provided the voice of Balok’s puppet in The Corbomite Maneuver, and the Gorn captain in Arena.

WHAT IS THAT! That is the actor, Ted Cassidy. His best-known role is of Lurch in the '60's TV series 'The Addams Family'. He was usually behind lots of make-up or a complete costume playing aliens or creatures like Bigfoot.

Ruk is played by Ted Cassidy, the same actor who played Lurch in the original "The Addams Family." He later went on to do the voice over in the intro for "The Incredible Hulk" in the 1970's

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Not sure if it's been mentioned yet but the actress that plays nurse Christine Chapel is Majel Barrett-Roddenberry, the wife of the creator of Star Trek, Gene Roddenberry.

The concept of replacing parts and at what point does the replacement cease to be the actual original person is part of the Ship of Theseus paradox. Its a very interesting as a philosophical riddle. Great, deep reaction!

As chief engineer, Montgomery Scott is basically a mad genius who knows how to cobble pieces and parts together to make a functional system or system bypass or temporary fix to handle immediate needs. He is an engineer and mechanic and a bit of a genius. Hes extremely studious and knowledgeable in engineering, but also in mechanics in general, whether its warp drives, impulse drives, shields, electronics, transporters, and so on. He knows just about everything about just about everything stem-to-stern about his vessel and most other starfleet vessels, and non starfleet ships as well. Add to that, he is an excellent tactical commander and fierce warrior when needed. If a thing is broke, "Scotty" can fix it. He is known as a miracle worker among the bridge crew.

Thank you for watching this! Its one of my favourite episodes for the questions it poses, the Ship of Thesius problem, human consciousness, what we could lose if we mechanize or digitize ourselves. The "Stalactite" scene has since been memed into legend.