The Key to Time (box set)

The Key to Time is DVD boxed set released by 2 entertain that contains all 6 stories of Season 16: The Ribos Operation, The Pirate Planet, The Stones of Blood, The Androids of Tara, The Power of Kroll and The Armageddon Factor.

The complete running time for all six serials in the arc is 633 minutes.

The Key to Time is available on DVD in North America and was released on region 2 (Europe) DVD on September 24, 2007.