Neil Gaiman has a history of lengthy development to get projects off the ground, like Sandman or American Gods, but perhaps none so long as his first novel Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch. Now, after 26 years, Good Omens will finally get the TV treatment as well, thanks to the late Sir Terry Pratchett.

For those unaware, Gaiman and Pratchett’s 1990 award-winner chronicles the angel Aziraphale and the demon Crowley attempting to prevent the End Times, as set in motion by the birth of Satan’s son. The novel was previously optioned in 2002 with Terry Gilliam directing stars Johnny Depp and Robin Williams, and again as a series in 2011 with Monty Python comedian Terry Jones and screenwriter Gavin Scott. Both projects fell through.

Pratchett died in March 2015 from a rare form of Alzheimer’s disease, after which Gaiman swore off adapting Good Omens without the co-author by his side. Per The Guardian, Gaiman has now revealed at a memorial event for Pratchett that the co-author left him a posthumous letter urging him to write an adaptation by himself, to which Gaiman recalled, “At that point, I think I said, ‘You bastard, yes.’”

Details are scarce for the moment, but Gaiman at least offered that the Good Omens series will take place over six episodes. What else should we expect from a Gaiman-led adaptation?