From a one-off story to the stars of the next 'Doctor Who' spinoff, the Sea Devils are a creature that's always struggled ...

Since 1971, the Master has become one of the most terrifying, dangerous, and complex of Doctor Who's long-running antagonists ...

So, Disney rolled the dice, pumped millions into special effects (dinosaurs have never looked better on Who!), and waited for the money to roll in. It didn’t, and it was never going to.

Over the years, Doctor Who has unfortunately underused some of its most exciting minor characters, and we'd love to see them return.