When the Batmobile leaves the Batcave, you can see the shadow of the vehicle on the wall revealing that it actually comes to a stop when it leaves the shot.
Gotham City is 14 miles from the Batcave entrance.
Notice Tattle puts Robin over his shoulder when taking him out of the Bat-mobile but when Tattle runs from it, Robin is in his arms and then returns to being over his shoulder at the manhole.
At the time this episode aired, Alfred was thought to be dead in the comics.
The license plate on the Bat-mobile is 2F-3567, Gotham 1966.
Batman's disco appearance and subsequent dance number gave rise to a thankfully brief dance craze over the "Batusi".
Variations between the Bat-pilot and regular series: opening theme is slightly different and the superimposed cliffhanger texts are angled. This is one of the only episodes of Batman's entire series run to feature a Special Guest credit given to Jill St. John as Molly preceding the ever-present Special Guest Villain credit. The study set including the entrance to the Bat poles is different.
The scenes of The World's Fair used in this episode are actual footage taken at the 1964-1965 New York World's Fair. The Moldavian pavilion was actually the Thailand pavilion.
Based on Remarkable Ruse of the Riddler from Batman #171 (May 1965), written by Gardner Fox. In the comic book the Riddler is jealous of the attention Batman is giving The Mole Hill Mob. The Riddler arranges a trap so Batman will apprehend the gang and give him the Caped Crusader's undivided attention.
This is the only time that Alfred Pennyworth wears a tuxedo throughout the entire episode. Also, Robin makes his only appearance wearing green cloth gloves (matching the fabric of his green tights); later episodes would have him wearing green leather gloves.
The footage first seen in "Hi Diddle Riddle" of The Dynamic Duo preparing to zoom out of The Batcave ("Atomic batteries to power, turbines to speed!" "Roger, ready to move out.") is recycled in many later episodes and in 1966 Batman The Movie.
Maitre'd: Inside table, Batman?
Batman: Uh, just looking, thanks. I'll stand at the bar. I shouldn't wish to attract attention.
Narrator: Will Robin escape? Can Batman find him in time? Is this the ghastly end for our Dynamic Duo? Answers tomorrow night. Same time, Same channel. One hint, the worse is yet to come.
Riddler: At last, Boy Wonder Robin. You and Caped Crusader both... are set for the final bow.
Batman: (With slurred speech) Officers. Out of my way! They've got Robin. (Getting into the Bat-mobile) Out of my way, I said, I've got to go after Robin!
Officer: Hand me the key, Batman. I'm afraid you're in no condition to drive.
Molly: You shake a pretty mean cape, Batman.
Molly: Why is a quarrel like a bargain?
Batman: Well, well. What master taught you to read?
Molly: The answer is it takes two to make it.
Narrator: What foul trickery are the Riddler and his evil Mole Hill Mob are up to now?
Tattle: Watch them fish eggs, Molly. They're full of calories. You'll blow up like a balloon.
Molly: Who cares? I'm hungry.
Tattle: I care. Get fat, you won't be able to get through the manholes anymore. Then what use you be?
Narrator: Meanwhile, in an abandoned subway tool room, deep under Gotham City, the secret headquarters of the infamous Mole Hill Mob.
Batman: What has neither flesh, bone, nor nail? Yet has four fingers and a thumb.
Robin: (Looking at his glove) A glove, of course.
Batman: When is the time of a clock like the whistle of a train?
Robin: When it's two to two?
Alfred: A million dollars.
Bruce: It's not the money, Alfred. It's the idea of it. My identity revealed. My value as a secret crimefighter ended. Everything I've trained myself for since my parents were murdered.
Riddler: What is it that no man wants to have but no man wants to lose?
Robin: A lawsuit.
Riddler: Correct, Boy Wonder!
Robin: There were three men in a boat with four cigarettes and no matches. How did they manage to smoke? They threw one cigarette overboard and made the boat a cigarette lighter.
Mr. Peale: Batman. You've made a mistake. He didn't steel the cross.
Mr. Peale: I tell you, it belongs to him. He lent it it me for a show.
Batman: But Mr. Peale, we saw him take it from you at gun point.
Riddler: Gun point? (Grabs gun and light it, laughing)
Robin: Holy ashtray, he did tip us off!
Robin: Gosh. If I could just figure out that riddle. Why can't I get it?
Batman: Maybe your mind's on that cute little teenager who waved to you on the way across town.
The Riddler: (Laughing) This is a recording. Before you trip over your cape, Batman, riddle me this. There are three men in a boat with four cigarettes but with no matches. How do they manage to smoke?
Batman: The Riddler controls his plots like artichokes. You have to strip off spiny leaves to reach the heart.
Batman: Why is an orange like a bell?
Robin: (Snapping his fingers) Answer. Because they both must be peeled.
Bruce: Oh, there you are, Dick. Feel like a bit of fishing?
Dick: (Coming down the steps) Holy barracuda! You mean... (Looking at Aunt Harriet) Sure, Bruce. Why not? Sounds swell, doesn't it, Aunt Harriet?
Bruce: Perhaps, if there had been anti-crime centers of the type we now propose when my parents were murdered by dastardly criminals.
Commissioner Gordon: I don't know who he is behind that mask of his, but I do know when we need him and we need him now!
Commissioner Gordon: Why is an orange like a bell? You know what this means, don't you?
Chief O'Hara: The Riddler.
Gordon: Right, Chief O'Hara, The Riddler. That infernal prince of puzzlers who's outwitted us a dozen times.
The actor or actress who played the villian or villainess of the week would be credited as the Special Guest Villain/Villianess and have their own theme music.
The character of Aunt Harriet was written into the series to counter the rumors that Bruce Wayne and Dick Grayson were gay. The series producers felt that a female aunt would "round out" Wayne Manor. She made her way into the comic book storylines in June 1964 becoming a semi-regular character into the mid-1970's until she was completely written out of the comics.
Cathy Ferrar said "Gleeps! It's Batman!" in episode #1, gained some notoriety and became known as the "Gleeps Girl." She returned in episode "The Joker Trumps An Ace", with an additional five syllables to her role, "Crime is certainly rampant these days!".