There are few shows that attract as many devotees as The X-Files. After a slow start in 1993, it went on to become one of the most successful TV shows of the 1990s, making stars of David Duchovny and Gillian Anderson, and racking up nine seasons, 202 episodes and two feature films before coming to an end in 2002.

The show’s combination of aliens, mythology and government conspiracy proved a heady mix, and continues to strike a chord, as demonstrated by its recent brief revival.

“The truth is out there” indeed, or, more specifically, in the answers to the fiendishly difficult questions in this quiz.