The Case of the Lucky Loser - S2-E2
Visible crew/equipment: After leaving her husband at train station, Harriet takes a cab to meet a man at a cabin. After a few mins, she takes the man's car to go home. As she drives away, there's a reflection of a man, in suit with glasses (possibly the director) standing offscreen. (00:05:20)
The Case of the Wayward Wife - S3-E13
Revealing mistake: Perry and Della step into an elevator but there is no line in the floor between the floor they are on and the elevator floor. It's continuous.
The Case of the Wandering Widow - S4-E6
Continuity mistake: Perry and Paul go to the park at ten o'clock at night but the sun is shining and casting shadows.
The Case of the Fickle Filly - S6-E11
Other mistake: George Tabor parts his hair on his right side, however when Perry cross examines Mr. Tabor his hair is parted on his left and then reverts back to his right side. The two dots on his tie are one low and one high, they also switch. The negative must have been flipped.
The Case of the Borrowed Baby - S5-E26
Continuity mistake: Mason takes the medallion back from the matriarch as he leaves her home. A little later the old lady shows up at Della's and shows the medallion to Della.
The Case of the Capricious Corpse - S6-E2
Revealing mistake: The murder victim is seen through the legs of a chair - just as the scene changes he blinks. (00:11:00)
The Case of the Sausalito Sunrise - S9-E19
Revealing mistake: Secretary Della Street answers the telephone in Perry's office and speaks briefly with the owner of an art gallery. She presses the "hold" button, then hands the receiver to Perry and says, "It's Mr. Clune." Perry and Mr. Clune have a lengthy phone conversation, even though Della never released the "hold" button.
The Case of the Sausalito Sunrise - S9-E19
Other mistake: The owner of a Los Angeles trucking company tells a driver who is going to San Francisco, "Take the San Diego Freeway toward Bakersfield." That freeway runs from San Diego to San Fernando. It does not go toward Bakersfield.
The Case of the Wayward Wife - S3-E13
Factual error: May buys a book for 4.95. Give the clerk a $10 bill but the register shows change of $5.15.
The Case of the Substitute Face - S1-E32
Revealing mistake: While Perry and two other men are drinking brandy at a table onboard a ship, stock footage of a storm at sea is shown. To simulate the rocking motion of the ocean, the camera slowly tilts from side to side. This is obvious because the surface of the brandy in the glasses also tilts. If the ship were really rocking, the surface of the brandy would remain horizontal.
The Case of the Screaming Woman - S1-E30
Visible crew/equipment: When Paul Drake opens the door to enter Perry Mason's office, the black-gloved hand of a crew member can be seen in the hallway.
The Case of the Desperate Daughter - S1-E27
Other mistake: When Perry telephones Edward Bannister, the father of a client, the view from Perry's office window shows that it is nighttime and rain is falling, but the wall clock in Bannister's home shows the time as 4:00.
The Case of the Empty Tin - S1-E25
Other mistake: Elston Carr, hoping to locate a former business partner's daughter, has a notice printed in the newspaper. His address is 133 North Remuda Drive in Los Angeles. When his home is shown, the number painted on the curb is 3972.
The Case of the Haunted Husband - S1-E19
Character mistake: Doris Stephanak tells Perry that a car her friend is accused of stealing had "5,700 miles on the speedometer." She meant "odometer."
The Case of the Moth-Eaten Mink - S1-E13
Plot hole: Perry Mason and Della Street are having dinner at a restaurant owned by Morey Allen. When waitress Dixie Dayton sees a diner who has been stalking her, she flees and is hit by a car. The next morning, Perry's incoming mail includes a retainer from Allen. His letter and check would not have arrived until the following day, at the earliest.
The Case of the Silent Partner - S1-E6
Other mistake: A police officer sees a fire burning inside the home of Lola Florey and calls the fire department. The ground is dry. Stock footage shows three fire trucks speeding toward the scene, and the streets are wet.
The Case of the Drowning Duck - S1-E4
Other mistake: Marv Adams, doing magic tricks to entertain children, says he needs a duck for his next trick. A boy brings out a duck from the barn. We hear the duck quacking several times, but its beak never opens.
The Case of the Drowning Duck - S1-E4
Other mistake: The sign at the entrance to Clyde Waters' farm has the apostrophe in the wrong place. It says "Water's Dairy Farm."
The Case of the Sun Bather's Diary - S1-E17
Character mistake: The reporter over the radio says Arlene Dowling is accused of murdering Frank Ballard, but the name of the murdered guy is George Ballard. Frank is her imprisoned father, Frank Dowling. (00:43:50)
The Case of the Runaway Racer - S9-E10
Other mistake: Pete Griston is test-driving a race car. When the car stalls, another driver crashes into him. Pete is thrown from the car and suffers a head injury. Several scenes show him with a huge bandage on the back of his head. His hair was not shaved. The bandage is on his hair.
