In this the first episode, Dara Ó Briain - comedian, amateur astronomer and confirmed sceptic - embarks on a journey to explore the mysteries of the world's pyramids. With the Royal Pyramids of Egypt as a backdrop, Dara, assisted by Egyptologist Chris Naunton and archaeologist Raksha Dave, delves into the fundamental questions: Why and how were these pyramids built? How did they come to be?

In the second episode of the series that explores the mysteries of the world's pyramids Dara returns to Egypt in search of answers to the two most compelling mysteries of all: how did the battle between Pharaohs and tomb raiders shape the evolution of the pyramids? And why did the pyramids then ultimately fail?