The first story to mention how many regenerations a Time Lord has was the Fourth Doctor story ‘The Deadly Assassin’ in 1976.
What was the first story to mention how many regenerations a Time Lord has, what caused the Fifth and Tenth Doctors to regenerate, and how many regenerations did the Eleventh Doctor say he was capable of having in ‘Death of the Doctor’?
Philip Madoc appeared in ‘The Krotons’, ‘The War Games’, ‘The Brain of Morbius’ and ‘The Power of Kroll’ in the classic era of Doctor Who, but was first involved with the programme when he appeared in the film ‘Dalek – Invasion 2150 AD’, which starred Peter Cushing as the Doctor. 
Which stories in the classic era of Doctor Who has Philip Madoc appeared in, what was his first involvement with the programme, and who was the first Doctor that he acted alongside? 
The evil Salamander looked identical to the Second Doctor in ‘The Enemy of the World’, which saw Patrick Troughton taking on both roles. ‘The Android Invasion’ showed the Kraals create a fake Earth, and ‘The Androids of Tara’ had Mary Tamm playing Romana, Princess Strella, and their two android doubles.
Who did the evil Salamander look identical to in ‘The Enemy of the World’, what story saw the Kraals create a fake Earth, and what four characters did Mary Tamm play in ‘The Androids of Tara’?
The first script by Douglas Adams to appear in Doctor Who was ‘The Pirate Planet’ in Season 16. Adams wrote under the pseudonym of David Agnew for the Season 17 story ‘City of Death’, and became world-famous during this time for ‘The Hitchhiker’s Guide to the Galaxy’.
What was the first script by Douglas Adams to appear in the Doctor Who ‘Key to Time’ season, which pseudonym did he write with for ‘City of Death’, and what is the name of the world-famous series of stories that he created?
The two stories to feature Sil in the classic era of Doctor Who were called ‘Vengeance on Varos’ and ‘Mindwarp’, and starred Nabil Shaban. It was planned for Sil to appear alongside the Ice Warriors in ‘Mission to Magnus’, which was eventually abandoned when the series was put on hiatus.
What were the names of the two stories to feature Sil in the classic era of Doctor Who, who played the character, and what enemy was it planned for Sil to appear alongside in the abandoned Season 23 story ‘Mission to Magnus’?
The first story to introduce the Cybermen in the classic era of Doctor Who was ‘The Tenth Planet’, and the last in the classic era was ‘Silver Nemesis’. The Patrick Troughton story ‘The Tomb of the Cybermen’ was the first to feature the Cybermats, and David Banks played the Cyber-Leader between ‘Earthshock’ and ‘Silver Nemesis’.
What were the first and last stories to feature the Cybermen in the classic era of Doctor Who, which was the first to feature the Cybermats, and who played the Cyberleader from ‘Earthshock’ onwards?
The Doctor Who story that was set on New Millennium’s Eve can either be referred to as ‘The TV Movie’ or ‘Enemy Within’, and starred Paul McGann as the Eighth Doctor with Eric Roberts as the Master and Daphne Ashbrook as Dr Grace Holloway.
What names have been given to the Doctor Who story that was set on New Millennium’s Eve, and who starred as the Doctor, Master and companion in that story?
The original makeup design for the Vinvocci was not completely green, with their faces natural. After filming had finished, Russell T Davies reconsidered the creatures’ design and decided to have the footage digitally recoloured at a very expensive cost.
Why was creating the final green look of the Vinvocci so expensive, what did they originally look like, and who was responsible for this?
The Doctor’s Christmas companions of the revived era have been Rose Tyler, Donna Noble, Astrid Peth, Jackson Lake, and Wilfred Mott. The two guest actors who will appear in ‘A Christmas Carol’ are Michael Gambon and Katherine Jenkins, and they will play the roles of Kazran Sardick and Abigail Pettigrew.
Who were the Doctor’s companions in the first five Doctor Who Christmas Specials of the revived era, and which two guest actors will appear in ‘A Christmas Carol’?
The red spiky alien who appeared in ‘Voyage of the Damned’ was called Bannakaffalatta and came from the Zocci race, and the green spiky aliens who appeared in ‘The End of Time’ were called Rossiter and Addams, and came from the taller Vinvocci race.
What was the name and colour of the spiky alien in ‘Voyage of the Damned’, what was the name and colour of the spiky alien in ‘The End of Time’, and which alien was taller?