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 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 Laughing Lady - S9-E1
Continuity mistake: Professor Toby is shown in the background as someone in the audience is highlighted, but is supposed to be on the witness stand and appears there in the next instant.
The Case of the Borrowed Baby - S5-E26
Continuity mistake: As Della burps the baby she has a towel over her shoulder one instant; in the next scene the towel is missing.
