Plot summary
Jana, the sensitive daughter of a creative genius, Dr. William Loren, is distraught over her parents' reliance on her father's five seemingly perfect servants. After Jana pushes one of the maids down the stairs, the maid then gets up without injury, being a robot built by Dr. Loren, complete with programmed memories and personalities. Jana feels trapped, and wishes to go out; her father believes he is protecting her from the outside world, keeping the windows permanently shut.
She implores her father to dismantle the robots before he and her mother become completely dependent on them. Dr. Loren feels that doing so would destroy his work, which he believes is a form of life. He eventually gives in to save his relationship with his daughter, and orders the robots to his basement workshop, where they are to wait to be disassembled. The machines protest, asking how their service was substandard; Dr. Loren again orders them downstairs.
Once the robots are gone, Jana is thrilled and begins looking forward to a new life with traveling, socializing, romance, and children. Her parents react strangely to these happy tidings, and this, combined with realizing that the family photo album contains no pictures of her as a child, prompts Jana to arrive at the shocking awareness that she is a robot. Like the servants, all of her memories were created by Dr. Loren.
Dr. Loren tries to explain that he and his wife were childless and wanted someone to love, and that they see her as their daughter. Jana is convinced that she was built not to be a beloved daughter, but to be merely a prop. She exclaims "I'm a machine" and repeatedly bangs her arm against a railing while yelling "No pain!" She becomes conscious of the fact that she cannot even feel love. This discovery causes Jana such anguish that her "father" recognizes it is not possible for her to go on this way. At some point later, the Lorens are seen relaxing as before, but it is revealed that Dr. Loren has erased Jana's identity and memory and now utilizes her as a replacement for the maid known as Nelda, who gave Mrs. Loren daily shoulder massages.
Credits
Adapted from Wikipedia contributors, The Lateness of the Hour (The Twilight Zone). Paragraphs and formatting adjusted; illustrations, reference markers, block quotations and non-story material omitted.