17 December

On 17 December 47 BC, the Seventh Doctor and Ace visited Rome for the festival of Saturnalia. (PROSE: The Best of Days)

Before the First Doctor and Susan Foreman settled down in Shoreditch in 1963, they took a brief trip to St Albans on this day in 1997 to ensure that the United Kingdom would remain safe during and after the 1960s. Unbeknownst to either of them, the Fourth Doctor and his companions Romana and K9 were in the vicinity on the same day. (PROSE: The Little Things)

In 2006, aboard the SS Elysium, Ruby Duvall was queried by Diana Milton and Leslie Laughland about her father and Isobel Watkins. They discussed the supposed Cyberman invasion and mostly found it bogus, little knowing that the Cyber-threat would reach them just a few days later. (PROSE: Iceberg)