Answer: Doctor Who
Although the idea of virtual reality, which serves as an alternative to our reality, is commonplace in movies and television shows decades ago, it has been less frequently used and actually not used. Until 1976 he was on television.
In the story of dr. Who "The Deadly Assassin" (1976), the writers introduced a dreamlike and computer generated alternative reality known as "The Deadly Assassin" Matrix. Within the framework, The Matrix was a huge electronic neural network that turned a user's thought patterns into reality. The users entered the matrix via a device that was connected to the head or included the head (or physically via special doors into which the user entered). The massive computer system they entered was a huge store of the combined knowledge of all Time Lords. 1
In another interesting moment, the plan of the future was anticipated The stories based on virtual reality, the doctor's enemies realized that they could not outrank him in the virtual environment, and sent someone to kill him while he was in The Matrix was stuck.
A small bonus trivia: "The Deadly Assassin" series is the only televised classic who-who series in which the Doctor had no travel companion. Scriptwriters have found it very difficult to write the storyboard scripts because the doctor lacked a companion to share his thoughts and plans.
Courtesy of the BBC.