I really love Lenny Henry's work, and it's a shame that his brand of humor/creativty never really found a lane here in the U.S. But I would encourage you to look into this and some of his other TV projects that are now available on DVD (Chef!, The Lenny Henry Show).
Neverwhere's story revolves around Londoner Richard Mayhew (Gary Bakewell), whose life as he knows it ends swiftly -- and somewhat unexpectedly -- when he tries to help a hapless stranger and immediately ceases to exist in the mortal world, joining the citizens of London Below.
This edition, unlike the past two editions released, features a 10 minute introduction by Gaiman, Henry, and producer Clive Brill. The three also provide a commentary. Also included in this latest edition is a map of London Below in the DVD's case.
It's a quirky and fun story that any true sci-fi geek will enjoy, despite its dated, low-budget look. If not a purchase, it's definitely worth a Netflix rental.
Neverwhere also features superb supporting performances from actors Tanya Moodie and Paterson Joseph.