30 years ago, the 19th season of Doctor Who began, and the show had taken a trip from Saturdays to the strange new world of weekday evenings...

A new Doctor faces his old enemy the Master who's set a series of traps to finally be rid of him once and for all. Will Event One be the one to do the job or will the trap behind that trap be a joy to spring?

What do you think of Castrovalva?