Brian Cox and Robin Ince are joined by comedian Bridget Christie, neuroscientist Professor Penny Lewis and psychologist Richard Wiseman to explore the science of dreaming. Our dreams have fascinated humans for millennia and then Freud came along and told us they really did mean something, and mostly they were about sex and anger. Was he right? Why do we dream and can we find meaning in the content of our dreams? Can our dreams help us solve problems, give us new ideas, help us write a symphony, even if they can't predict the future? The panel also discuss what is going on in the brain whilst we sleep, and how memories are formed and consolidated while we snooze. It turns out the phrase "better to sleep on it" has a strong scientific argument. Producer: Alexandra Feachem