VIDEO: Strax The Sontaran's Twelve Doctors Field Report

With only a few days to go before Matt Smith's final episode as the Doctor, the Sontaran Strax sends a new field report on his unique assessment of all of the incarnations of the Time Lord to date.

Which Doctor chose to become 'a female' for their incarnation? Whose sartorial salad led to weakness of mind and limpness of body? And who was a blight on the Sontaran race? Find out here: