The Alfred Hitchcock Hour (1962)

S3E11 Consider Her Ways

Title: Consider Her Ways Plot: Dr. Jane Waterleigh engages in a groundbreaking study on altered perception by taking a novel drug. During the experience, she imagines a world dominated by women, where men have vanished due to a genetic mishap caused by her colleague, Dr. Hillyer. Once she awakens, Dr. Waterleigh tries to change the course of history by stopping Dr. Hillyer before he can advance his perilous research. Unfortunately, her plans backfire when Dr. Hillyer's son resolves to continue his father's dangerous legacy.