In 2006, an experiment of the Department of Energy in hot fusion to produce energy releases a storm in time along 240 minutes, changing history. Only the personnel in the core of the laboratory know the true story and now they need to fix points in the history that have been punctually changed. The bureaucrat and former Marine Doug Phillips is a family man that is recruited by his friend Flynn to join an expedition to 1944 due to his great knowledge of the Battle of Hürtgen Forest in Germany. The team formed by Doug, Flynn, Toni Newman, J.D. and Wix is assigned to find a monk from 1546 that has been accidentally transported to the spot and is the carrier of Black Plague.

An extended version of the first episode, running about 55 minutes rather than the regular 50 minutes. It contains material that was cut from "Rendezvous with Yesterday" and then added to two subsequent episodes: Tony arriving alone outside of the Time Tunnel complex ten years earlier, when he was unknown to the security forces and Doug Phillips (see "End of the World"), and Tony being reunited with Doug in a prehistoric rainforest (see "Chase through Time"). In the pilot film it is Senator Clark, who suggests that Time Tunnel personnel should just go outside the base to save Tony; however, in "End of the World" since Senator Clark is not in the episode, his lines are given to the technician Jerry.

In 1976, there's an outbreak of a disease that no one has seen before. All what they know is that rsembles a disease that existed at around 1871, and that a Dr. Henderson was able to save most of his patients but the Chicago Fire destroyed his records. Dr. Earnshaw the doctor looking for a cure was approached by a man, Jeffrey Adams, who believes that he could help him. It seems that a Dr. Amos Cummings has perfected the art of time travel, and the plan is for Earnshaw and Adams to go back to 1871 and learn how Henderson cured his patients. But a glitch in the machines computers sends them the day before the fire not four days as intended.

Silent footage shot with a home movie camera during the filming of the pilot.

This is a compilation of three episodes of the series, "THE TIME TUNNEL". The first was the pilot about a government project. Which is a device that can send people into the future or past. When a senator sent to inspect the project and decide if it is feasible to continue, is not impressed, Tony Newman, one of the scientists working on it, decides to go through it, knowing fully well, that he has no idea what the results might be. He ends up in 1912, on the Titanic, just before it sank. Naturally, he tries to warn them but they of course don't believe him. Doug Phillips another scientist follows him. Naturally, they could not stop it. But the scientists back in the present were able to get them out of there. Their next stop is the 19th century, where some aliens are invading with the purpose of taking all of the planet's food. Of course Tony and Doug must try and stop them. And then, back in the present, one of the projects technicians, is a spy, he kills the one manning the tunnel an

In 1982, five feature-length TV movies were assembled from 10 complete individual episodes with portions of the first episode as introductory material. Old Legends Never Die edited together episodes 27 ("Merlin The Magician") and 16 ("The Revenge Of Robin Hood").