Lachlan Murdoch will become the boss of one of the world's most powerful media empires. His father, Rupert, has said his eldest son will succeed him as chairman of Fox and News Corp. Lachlan's appointment ends years of speculation over which one of the siblings will take control of the businesses their father built.

At one point Lachlan's younger brother James was favourite for the top job but it didn't go his way. So, who is Lachlan Murdoch, how did he win his father's approval and what impact will he make? Timandra Harkness pieces together what we know about him through interviews he's given and by speaking to people who've worked for and observed the Murdochs.

Guest: Paddy Manning, Author, The Successor: The High-Stakes Life of Lachlan Murdoch. Michael Wolff, Author, The Fall: The End of the Murdoch Empire. Sarah Ellison, Washington Journal National Enterprise Reporter, Author, War at the Wall Street Journal. Kelvin MacKenzie, Former Editor, The Sun. Claire Enders, Founder, Enders Analysis.

Credits: ABC Dynasties

Presenter: Timandra Harkness Producer: Nick Holland Researcher: Diane Richardson Editor: Richard Vadon Sound: James Beard