The Time Tunnel is an American color science fiction TV series written around a theme of time travel adventure starring James Darren and Robert Colbert. The show was creator-producer Irwin Allen's third science-fiction television series and was released by 20th Century Fox Television and broadcast on ABC. The show ran for one season of 30 episodes from 1966 to 1967. A pilot for a new series was produced in 2002 but did not proceed to a series. A history of the series by Martin Grams, Jr., was published in 2012. Premise Project Tic-Toc is a top-secret U.S. government effort to build an experimental time machine, known as "The Time Tunnel" due to its appearance as an elliptical passageway. The base for Project Tic-Toc is a huge, hidden underground complex in Arizona, 800 floors deep and employing more than 12,000 specialized personnel. The directors of the project are Dr. Douglas Phillips (Robert Colbert), Dr. Anthony Newman (James Darren), and Lt. General Heywood Kirk (Whit Bissell). The specialists assisting them are Dr. Raymond Swain (John Zaremba), a foremost expert in electronics, and Dr. Ann MacGregor (Lee Meriwether), an electrobiologist supervising the unit that determines how much force and heat a time traveler is able to withstand. The series is set in 1968, two years into the future from the actual broadcast season, 1966-67. Project Tic-Toc is in its 10th year when United States Senator Leroy Clark (Gary Merrill) comes to investigate to determine whether the project, which has cost $7.5 billion (equivalent to $ billion in ), is worth continuing. Senator Clark feels the project is a waste of government funds. When speaking to Phillips, Kirk, and Newman in front of the Time Tunnel, he delivers an ultimatum - either they send someone into time and return him during the course of his visit or their funding will cease. Tony volunteers for this endeavor, but he is turned down by project director Doug Phillips. Defying this decision, Tony sends himself into time. Doug follows shortly after to rescue him, but they both continue to be lost in time. Senator Clark returns to Washington with the promise that funding will not be cut off to the project, leaving General Kirk in charge. The stage is set for the progress of the series as Tony and Doug are now "switched" from one period in history to another, allowing episodes to be set in the