The Twilight Zone - Season 1 Episode 4 Dreams for Sale

On an idyllic outdoor picnic with her husband and their twins a nameless woman becomes confused and disoriented when events begin to repeat themselves. Then she awakens and discovers she is in a futuristic dream-making machine - she is only a drone in a future where no "outside" exists since Man has grown over the whole planet and turned it into factory, and the only escape is a 15-minute virtual reality scenario once a week. Despairing of her future, the woman returns to the reality which breaks down, "trapping" her there forever.