After stealing the Tesseract during the events of “Avengers: Endgame,” an alternate version of Loki is brought to the mysterious Time Variance Authority, a bureaucratic organization that exists outside of time and space and monitors the timeline. They give Loki a choice: face being erased from existence due to being a “time variant” or help fix the timeline and stop a greater threat.

Professor Brian Cox reveals how the fundamental scientific principles and laws explain not only the story of the universe but also answer mankind's greatest questions.

Time is a 2006 documentary television series first broadcast on BBC Four in the United Kingdom. It is written and presented by Michio Kaku.

Time Trax is an American/Australian co-produced science fiction television series that first aired in 1993. A police officer, sent through time into the past, has to track down and return convicted criminals who have escaped prison in the future. This was the last new production from Lorimar Television.

Asking how you tell what's real and what isn't sounds like an obvious question. But in this series of six programmes, James Burke shows that the more you think about it the harder it is to answer. After all, what have you got, apart from your five senses, to prove those senses are giving you the real thing?