Description: An exploratory vessel returns after a ten-year journey, but due to time dilation, four hundred years have passed since its departure. Ark craft Pisces has been searching for habitable planets for ten years - their time. On the Ark 409 years have passed, proving Einstein correct. But there are penalties to suffer for travelling that fast. (10 year space trip returns 409 years in the future) The exploration ship Pisces returns to the Ark after what was supposed to be a 10 year mission. Stunned Devon (Keir Dullea), Garth (Robin Ward) & Rachel (Gay Rowan) don't even know how to begin to tell Pisces commander Colonel Garoway (Lloyd Bochner) and his two crew-mates Teale (Carol Lazare) and Janis (Diana Barrington) that they are roughly 400 years off schedule or that the course of the Ark is headed for the heart of the sun unless they can stop it. It does not become readily apparent to the crew of the Pisces what has happened and they invite Devon, Garth & Rachel to come with them whilst they reconoitre. The Pisces crew pass out and barely regain consciousness in time to re-dock with the Ark. They have been traveling at the speed of light for ten years which is why they are so tired. They also have 'Space Senility' - a condition brought on by extended time traveling at the speed of light.