Recurring character Susan Goodspeed, one of the Blind School students, is referred to in this episode as "Susan Farley".
After seeing Mr. Blevins, the doctor tells Charles Mr. Blevins doesn't have any family. When Charles returns with Mrs. Blevins, the doctor immediately greets her by calling her Mrs. Blevins.
When Mr Bevins looks up at the wall clock, it is not working. The pendulum is stationary since they would not have wanted the loud tick tock noise in the studio. It's also designed to be a mantle clock and has to be wound with a key every 7 days. Winding is not accessible if the clock is that high on the wall.
In the beginning of the episode, when Mr. Bevins is talking to his wife, the clock is not working because the pendulum isn't swinging but yet through their conversation you can hear a clock ticking.