The flashlight makes no reflection in the window when Paul is looking into the cabin, but makes a large beam of light once shined into the cabin.
Right after the drink is thrown at Mrs. Cromwell, her dress and face intermittently change from being wet to dry and back again.
A crime lab technician claims to have found the print of an unknown person's right forefinger on a murder weapon. There is, in fact, no way to determine which finger an unidentified fingerprint came from.
Once a client is represented by counsel, the insurance adjuster would be forbidden to contact the injured party.
During the preliminary hearing, Burger is interviewing the first witness. When he is done, he invites Mason to cross-examine. As Mason approaches the witness stand, he starts interviewing the second witness. Mason interviews the first witness, the private detective. This could be cut out of some versions to allow for more commercials. In 2021 MeTV began allocating 65 minutes for the show, presumably to allow for current standard amounts of commercials without cutting original content.
When Elaine Barton is awakened by an early caller at the door, she is wearing full makeup including false eyelashes. If a character (Elaine Barton) occasionally puts on makeup, she would remove it at night. But an actress (Kipp Hamilton) always wears makeup when acting including a bed scene. Therefore, waking up with makeup is not a goof.
When the police are in Elaine's apartment collecting clues about Harry Pitkin's murder, Tragg walks out to confront Elaine and Perry Mason with the gun he found close to Harry's body. Tragg is holding the gun in his own hand with no glove or handkerchief. Although it may appear this way, a careful observation indicates he is holding the gun with a pen or pencil.
Harry Pitkin is still breathing after he has supposedly been shot dead.