18 September

On 18 September, 1945, Albert Einstein was accidentally transported onboard the Eleventh Doctor's TARDIS. After he was briefly turned into an Ood, the Doctor returned him. (TV: Death Is the Only Answer)

Behind the scenes

 * 1933 - Actor Michael Allaby was born.
 * 1947 - Actor Paul Seed was born.
 * 1956 - Actor Tim McInnerny was born.
 * 1958 - Actress Linda Lusardi was born.
 * 1963 - Script editor Gary Russell was born.
 * 1965 - "Trap of Steel" was first broadcast on BBC1.
 * 1976 - Part three of The Masque of Mandragora was first broadcast on BBC1.