Release Message:  Since Einstein developed the theory of relativity physicists could no longer take time for granted and have been struggling ever since to understand it. Hosted by Morgan Freeman.

Description:  Since Einstein developed the theory of relativity physicists could no longer take time for granted and have been struggling ever since to understand it. This program examines the current thinking and emerging ideas about time. But when it comes to the possibility of time travel physicist have lots of ideas about how to do it but they can't agree if it is possible.