The story ends with a nearby clock tower striking midnight and Della, Perry and Paul racing out of the office to get out of there before it ends. This is the only time the clock chimes are heard on screen.
A rare Perry Mason hearing/trial that did not elicit a confession from the guilty party. The perpetrator maintained his/her innocence right to the end.
In the movie Desperate (1947), Burr and Brody switched sides. Burr played the villain, Walt Radak, and Steve Brody played the good-guy trucker.