In 2011 to celebrate Doctor Who and Prisoner Zero, the Royal Mint in conjunction with the BBC released a very Limited Issue Dr Doctor Who Silver Proof Medal struck in solid .925 Sterling Silver.
The reverse design depicts a Prisoner Zero and the obverse a picture of the Doctor's Tardis both designed by Matthew Bonaccorsi.
The medal comes boxed with a certificate of Authenticity.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.