The Mandalorian season finale introduced a powerful weapon from the Star Wars mythos, but what is the Darksaber, and what makes it so important?

The Romulan Tal Shiar look set to play a major role in the upcoming Star Trek: Picard series, but who are they, and what role might they play?

The Triwizard Tournament took place in Harry Potter and the Goblet of Fire. Here's the history of the competition and why it was ended (twice).