Other mistake: When the camera looks at Paul Drake watching the recreation, the cameraman and equipment is reflected on the mirror housing.
Perry Mason (1957)
1 other mistake in show generally
Starring: Raymond Burr, Barbara Hale, Ray Collins, William Hopper
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.
Hamilton Burger: Incompetent, irrelevant, and immaterial.