Goldie's Japanese masseuse speaks to Columbo in Japanese. Her comments mean "Well, Mr. Columbo, I think you are really swell and I like you. Hope to see you again. Goodbye."
When Markham goes into Williamson's house and takes his partially-unpacked suitcase, it is actually quite a small suitcase. Williamson had said he'd been away in Europe for several weeks, and this suitcase would not have been large enough to contain enough clothes for such a long trip.
When Goldie puts on the blue dressing gown she ties the sash around the back. A moment later we see it properly tied through only the front half.
When they were up in the sky tram at the end, Roger opened the doors on the side, presumably to try and throw the cigar box out. When he's on the floor gathering up the cigars, the doors are closed, but when they show Columbo and Logan, the door is open again. When Roger puts the necklace on Columbo, the doors are closed again.
When Roger Stanford arrives at David's office, the suitcase and coat were already there and when he is in David's office you hear Quincy saying its almost six o'clock. But when Columbo was in Miss Bishop's office he said someone told him the items were dropped off at six o'clock. Clearly this is incorrect, since the items were already there before Roger arrived.
As Beth is waiting for Bryce to enter the room, she opens a box of chocolates. She picks up one chocolate, the camera pans away and when it comes back there are five wrappers on the bed beside the box.
In the opening scene, we see Dale remove several paintings from the wall. Then, when Tracy enters, we see her admire the paintings still on the wall--including two of the paintings that Dale had taken down already. These two paintings not only have jumped back onto the wall--they also mended themselves where Dale had sliced them with a knife.
It is in this episode that Columbo's elusive first name is revealed (although not intentionally). When he shows his badge upon first meeting General Hollister (Eddie Albert), his identity card is also visible. Although it is rotated ninety-degrees counter-clockwise, the signature "Frank Columbo" is visible. It can be seen quite clearly on the DVD version (first season collection) by freezing the frame and zooming in on the card.
As Brimmer drives to the construction site in his black Cadillac Eldorado, a brief shot of Leslie Williams driving in a green car is inserted, from "Ransom for a Dead Man."
When Columbo asks Brimmer to write out an improvised receipt, Brimmer starts to write on the folder itself. The camera cuts to Columbo, then back to Brimmer again and he is now writing on a receipt pad.
Columbo kneels down to get a bowl to grate the cheese for the omelet. However, when he takes the bowl out there is already cheese in it.
During the interview, Ken is clutching his hands in front of his face when the camera is on him. When the camera reverses angle and shows Gloria Jr., his hands are on the armrests of his chair.
As Ken asks Lilly how much blackmail she wants, the strawberry in her hand goes from intact (when the camera is behind her) to half-eaten (when the camera is facing her), even though she never puts it in her mouth.
Early in the episode, Ken points to 14 books and says that together they've done 15 Mrs. Melville books. The 15th is the one that Jim just finished. However, later Ken gives Lilly a copy of Prescription Murder, which is not among the 14 earlier ones. There's no reason for its omission, although there are two copies of Mrs. Melville in London.
In the beginning, Ken says that Jim wrote 15 Mrs. Melville novels. However, the shelf he gestures at has 16 books (two on the top with spines not visible). Also, when Ken returns to the office later, the two books on top have disappeared.
Trivia: On the way to Ken's cabin, Jim comments that he has the feeling of having done this before, even though he's never been to Ken's cabin. This line becomes explicable at the end, when we find that he had written down Ken's murder plot idea.
While at the counter in the diner talking to the daughter of the murdered man, Columbo has a new bowl of chili and he has yet to eat of it. Once they move to one of the booths, some of the chili has disappeared and an obvious line of where it used to be can be seen.
Approximately one hour and fifteen minutes into the episode, Dr. Fleming has asked Columbo to turn out the lights when leaving his office. Columbo reaches for the light switches but they are both down (off). He simply touches the top of one of the switches and the lights go out.
When Dr. Fleming smashes the balcony window, his shadow can be seen on the background, revealing it to be a simple backdrop.