While the main thrust of the plot may be about a mixup of the Antichrist at birth and his coming into his power at the cusp of the apocalypse, the real shining heart is the friendship between an angel and a devil who are both terrible at their jobs.
Seldom is casting so fantastically on point as Michael Sheen and David Tennant, so much so that I almost neglected to shoutout the rest of the cast performances. It’s hard not to think of these two as Aziraphale and Crowley, harder still not to believe that they’ve been friends for centuries.
I’ve not read the book but the adaptation has all the hallmarks of a Gaiman/Pratchett collaboration: smartly funny absurdist wit, good pacing and a soundtrack by Queen. So, a quintessential British comedy miniseries.