Dr. Rubin's phone number typed on the pill box is CR5I5I5. Several scenes later, when Perry starts to give Lieutenant Tragg the number, he starts with "Crestview 4..." before Tragg cuts him off.
After Mildred Kimber fires the gun, the vase on the table shatters. Within seconds the light bulb also appears to shatter and smoke. The next scene shows the light on and no longer smoking.
At 31:52 Tragg is racing to the Kimber apartment in a black 1957 Buick Roadmaster Riviera, but he arrives moments later in a black 1957 Buick Special. The cars have very similar lines but the Special has 3 "exhaust" ports and the Riviera has 4.
After the fire is extinguished at Lola's apartment, the furniture shows no damage.
At 25:52, a car drives up to Sam Lynk's house. It is supposedly driven by Perry Mason. It is obviously daylight as shown in the scene, but Perry Mason had just left visiting Mrs. Kimber with Della late at night.
An unseen person starts an arson fire by splashing a flammable liquid on a pile of rags and tossing a lit match on them. The liquid is not really flammable; the rags catch fire immediately, but an adjoining puddle of the liquid does not.
In her living room, Mrs. Kimber is wiping off fingerprints from the revolver. Even though the gun goes off and destroys items on the pedestal table, nothing comes out of the end of the barrel.
In the lobby of Mildred Kimber's apartment building, Perry gives a "No comment" to a reporter's question, as this conversation finishes the shadow of a boom mic is in the upper left corner and the reporters rush to get to a phone.
A service revolver is stolen from a pocket of Bob Kimber's jacket and he supposedly fails to notice, but it's simply not believable that he wouldn't notice the theft of something that bulky and heavy.
Perry and Della are working late (it's dark out and the clock reads 11:55) when they receive a phone call from Lola. After a call to Tragg, they go to Lola's (Perry says it'll take a half hour to get there), where they spend a few minutes. Even though it must be long after midnight by now, Perry decides to pay unannounced visits to the homes of his client and then Sam Link, a nightclub owner he doesn't know. It's unlikely a lawyer would bother people at their homes so late.
At 44:19, an old man, most likely the character is supposed to Mrs. Kimber's nursery assistant, is seen in Lola's apartment. Since Lola later admits she started the fire in her own apartment, why would this man have been in her apartment? The episode uses him as a red herring since it is never established how or why he would be in Lola's apartment. He would be trying to help Mrs. Kimber, but the reason for his being seen in Lola's apartment is never explained.
Lola is taken away by two ambulance workers from her apartment after eating the poisoned chocolates. She is found on the floor wearing a nightgown. When she leaves the hospital the next morning, she is carrying her purse and a small handheld makeup case, and she is wearing a dress. Unless someone visited her in the hospital, how would she have been able to get those personal possessions
In the lobby of Mildred Kimber's apartment building, Perry gives a "No comment" to a reporter's question and the reporters rush to get to a phone. One of the reporters walks between Perry and a photographer taking Perry's picture, which would ruin the shot, but the photographer turns and walks away without taking a second picture of Perry.