F is for... Fisher King

The Fisher King was a belligerent alien who had conquered the planet Tivoli. After 10 years of rule, the Tivolians were liberated by the Arcateenians. The Fisher King apparently died, and a Tivolian undertaker named Prentis was commissioned to take his body for burial on 1980's Earth. However, he was really in a state of suspended animation. Once on Earth, at an abandoned military training base in the Highlands of Scotland, the alien awoke and killed Prentis. He then killed Alice O'Donnell - a member of a research team from 2119, who had been brought back in time by the Doctor to investigate the Fisher King's origins. The alien had a scheme to alert his people that he was still alive and that they should mount a rescue mission, making Earth their new home. Those it killed became ghosts, who would act as psychic transmitters. The Doctor tricked the Fisher King into becoming trapped in the open as he detonated a power pack from Prentis' ship, blowing up a nearby dam and flooding the valley. The Fisher King was killed in the deluge.

Played by: Neil Fingleton. Voiced by Peter Serafinowicz and Corey Taylor. Appearances: Before the Flood (2015).

• The Fisher King is named after the character in Arthurian mythology, the last holder of the Holy Grail. He was an old man who bore a wound that would not heal, but who could be cured when the right person came along who would ask a certain question. The Fisher King in the Doctor Who story is waiting for his people to come and rescue him.
• Fingleton was the UK's tallest man, until his early death in February 2017, at the age of only 36. Previously a basketball player, he turned to acting, and roles included a giant in Game of Thrones, as well as providing the motion capture work for Ultron in second of Marvel's The Avengers movies.
• Corey Taylor is the lead singer of the band Slipknot. He is a big Doctor Who fan, and his voice was sampled to provide the Fisher King's roar.

The Fisher King at the Doctor Who Experience in 2015.