Celebrity Snoop Dogs? Replaying all of Downton Abbey from the start? The Luminaries? Compared to some of what’s been served up lately, Derren Brown: 20 Years of Mind Control is a rich imaginative feast. The live trick at the start and the repeated vintage trick at the end weren’t available to previewers, but the clip show that makes up the meat of the evening was a 90-minute celebration of Britain’s preeminent mind control jockey.