P is for... Porridge

Encountered by the Doctor when he and Clara took her young charges Artie and Angie Maitland to Hedgewick's World of Wonders, a now derelict amusement park spanning an entire planet. In Mr Webley's waxworks Artie was challenged to play a game of chess against a purely robotic Cyberman, but it turned out that this was a trick. Porridge was hidden underneath the table operating the inanimate suit.

The reason for the Cyberman being here was because a great battle had been fought nearby in the Cyber-wars. They had only been defeated when an entire star system had been blown up.

Elsewhere on the planet was a punishment platoon - conscripts who had been deemed failures but still had to serve their time. The Doctor used his psychic paper to claim to be an Imperial representative, and was able to place Clara in command of the platoon. 

The planet housed a Cyber-factory where a whole new army of Cybermen were being created or repaired. Porridge joined Clara and the platoon to defend against them. The platoon held a powerful bomb - capable of destroying the entire planet.

When it became clear that the Cyber-army could not be stopped, Porridge took charge of the weapon and detonated it - as he was really the Emperor Ludens Nimrod Kendrick Cord Longstaff XLI. The Doctor had recognised him earlier from his waxwork effigy. Tired of court life, and feeling lonely, he had run away for some adventure.

He alerted his people so that they rescued him and the others just before the planet was destroyed.

Safely on his flagship, Porridge proposed marriage to Clara, but she politely declined.

Played by: Warwick Davis. Appearances: Nightmare in Silver (2013).

• Davis is best known for his fantasy cinema work, which began with a role as the Ewok Wicket in Return of the Jedi. He has since gone on to work on all of the subsequent Star Wars movies, sometimes in multiple roles. With George Lucas he also starred in Willow and its later TV series (produced by the director of his Doctor Who appearance).
• Multiple roles have also been his in the Harry Potter franchise.
• In the UK he is well known for presenting the popular quiz show Tenable, as well as appearing in comedic collaborations with Ricky Gervais.
• Davis' costume as Porridge was based on a Warhammer 40k miniature figure known as Rogue Trader.