Although they play a courting couple in this episode, Peter Stebbings (James Pendrick) and Charlotte Sullivan (Charlotte/Miriam) are in reality actually married and have a child.
In this episode, Pendrick's movie-making and exhibition is based on an actual turn of century invention by Eugène Lauste, first to record sound and picture on film simultaneously. Patrons listened to the action through headphones exactly as shown. Unable to gain funding, he became destitute and forgotten. His system finally took off when Bell Laboratories purchased his expired patents and equipment in the late 1920s. Even today, his system is the one that used in movie-making.
In this episode, Thomas A. Edison's character initially disparages the idea of sound with moving pictures. In real life, Edison was completely deaf in one ear and partially deaf in the other, and he considered this to be a blessing because it allowed him to think and read with total concentration.
The candlestick telephone style earpieces used for the headphones had a comical and impractical look. In fact, the Electrophone system of 1895 had a more streamlined headset, and was intended for listening to theater events remotely.
The editor of Pendrick's motion picture is a woman. In reality, editors in the early days of cinema were largely women.